--- _id: '12366' abstract: - lang: eng text: "Recent substantial advances in the feld of superconducting circuits have shown its\r\npotential as a leading platform for future quantum computing. In contrast to classical\r\ncomputers based on bits that are represented by a single binary value, 0 or 1, quantum\r\nbits (or qubits) can be in a superposition of both. Thus, quantum computers can store\r\nand handle more information at the same time and a quantum advantage has already\r\nbeen demonstrated for two types of computational tasks. Rapid progress in academic\r\nand industry labs accelerates the development of superconducting processors which may\r\nsoon fnd applications in complex computations, chemical simulations, cryptography, and\r\noptimization. Now that these machines are scaled up to tackle such problems the questions\r\nof qubit interconnects and networks becomes very relevant. How to route signals on-chip\r\nbetween diferent processor components? What is the most efcient way to entangle\r\nqubits? And how to then send and process entangled signals between distant cryostats\r\nhosting superconducting processors?\r\nIn this thesis, we are looking for solutions to these problems by studying the collective\r\nbehavior of superconducting qubit ensembles. We frst demonstrate on-demand tunable\r\ndirectional scattering of microwave photons from a pair of qubits in a waveguide. Such a\r\ndevice can route microwave photons on-chip with a high diode efciency. Then we focus\r\non studying ultra-strong coupling regimes between light (microwave photons) and matter\r\n(superconducting qubits), a regime that could be promising for extremely fast multi-qubit\r\nentanglement generation. Finally, we show coherent pulse storage and periodic revivals\r\nin a fve qubit ensemble strongly coupled to a resonator. Such a reconfgurable storage\r\ndevice could be used as part of a quantum repeater that is needed for longer-distance\r\nquantum communication.\r\nThe achieved high degree of control over multi-qubit ensembles highlights not only the\r\nbeautiful physics of circuit quantum electrodynamics, it also represents the frst step\r\ntoward new quantum simulation and communication methods, and certain techniques\r\nmay also fnd applications in future superconducting quantum computing hardware.\r\n" acknowledged_ssus: - _id: NanoFab - _id: M-Shop - _id: EM-Fac alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Elena full_name: Redchenko, Elena id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87 last_name: Redchenko citation: ama: Redchenko E. Controllable states of superconducting Qubit ensembles. 2022. doi:10.15479/at:ista:12132 apa: Redchenko, E. (2022). Controllable states of superconducting Qubit ensembles. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:12132 chicago: Redchenko, Elena. “Controllable States of Superconducting Qubit Ensembles.” Institute of Science and Technology Austria, 2022. https://doi.org/10.15479/at:ista:12132. ieee: E. Redchenko, “Controllable states of superconducting Qubit ensembles,” Institute of Science and Technology Austria, 2022. ista: Redchenko E. 2022. Controllable states of superconducting Qubit ensembles. Institute of Science and Technology Austria. mla: Redchenko, Elena. Controllable States of Superconducting Qubit Ensembles. Institute of Science and Technology Austria, 2022, doi:10.15479/at:ista:12132. short: E. Redchenko, Controllable States of Superconducting Qubit Ensembles, Institute of Science and Technology Austria, 2022. date_created: 2023-01-25T09:17:02Z date_published: 2022-09-26T00:00:00Z date_updated: 2024-08-07T07:11:56Z day: '26' ddc: - '530' degree_awarded: PhD department: - _id: GradSch - _id: JoFi doi: 10.15479/at:ista:12132 ec_funded: 1 file: - access_level: open_access checksum: 39eabb1e006b41335f17f3b29af09648 content_type: application/pdf creator: cchlebak date_created: 2023-01-25T09:41:49Z date_updated: 2023-01-26T23:30:44Z embargo: 2022-12-28 file_id: '12367' file_name: Final_Thesis_ES_Redchenko.pdf file_size: 56076868 relation: main_file file_date_updated: 2023-01-26T23:30:44Z has_accepted_license: '1' language: - iso: eng month: '09' oa: 1 oa_version: Published Version page: '168' project: - _id: 2564DBCA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '665385' name: International IST Doctoral Program - _id: 26336814-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '758053' name: A Fiber Optic Transceiver for Superconducting Qubits - _id: 237CBA6C-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '862644' name: Quantum readout techniques and technologies publication_identifier: isbn: - 978-3-99078-024-4 issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria status: public supervisor: - first_name: Johannes M full_name: Fink, Johannes M id: 4B591CBA-F248-11E8-B48F-1D18A9856A87 last_name: Fink orcid: 0000-0001-8112-028X title: Controllable states of superconducting Qubit ensembles type: dissertation user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 year: '2022' ... --- _id: '12368' abstract: - lang: eng text: "Metazoan development relies on the formation and remodeling of cell-cell contacts. The \r\nbinding of adhesion receptors and remodeling of the actomyosin cell cortex at cell-cell \r\ninteraction sites have been implicated in cell-cell contact formation. Yet, how these two \r\nprocesses functionally interact to drive cell-cell contact expansion and strengthening \r\nremains unclear. Here, we study how primary germ layer progenitor cells from zebrafish \r\nbind to supported lipid bilayers (SLB) functionalized with E-cadherin ectodomains as an \r\nassay system for monitoring cell-cell contact formation at high spatiotemporal resolution. \r\nWe show that cell-cell contact formation represents a two-tiered process: E-cadherin\x02mediated downregulation of the small GTPase RhoA at the forming contact leads to both \r\ndepletion of Myosin-2 and decrease of F-actin. This is followed by centrifugal actin \r\nnetwork flows at the contact triggered by a sharp gradient of Myosin-2 at the rim of the \r\ncontact zone, with Myosin-2 displaying higher cortical localization outside than inside of \r\nthe contact. These centrifugal cortical actin flows, in turn, not only further dilute the actin \r\nnetwork at the contact disc, but also lead to an accumulation of both F-actin and E\x02cadherin at the contact rim. Eventually, this combination of actomyosin downregulation \r\nand flows at the contact contribute to the characteristic molecular organization implicated \r\nin contact formation and maintenance: depletion of cortical actomyosin at the contact disc, \r\ndriving contact expansion by lowering interfacial tension at the contact, and accumulation \r\nof both E-cadherin and F-actin at the contact rim, mechanically linking the contractile \r\ncortices of the adhering cells. Thus, using a biomimetic assay, we exemplify how \r\nadhesion signaling and cell mechanics function together to modulate the spatial \r\norganization of cell-cell contacts." acknowledged_ssus: - _id: LifeSc - _id: Bio - _id: NanoFab alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Feyza N full_name: Arslan, Feyza N id: 49DA7910-F248-11E8-B48F-1D18A9856A87 last_name: Arslan orcid: 0000-0001-5809-9566 citation: ama: Arslan FN. Remodeling of E-cadherin-mediated contacts via cortical  flows. 2022. doi:10.15479/at:ista:12153 apa: Arslan, F. N. (2022). Remodeling of E-cadherin-mediated contacts via cortical  flows. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:12153 chicago: Arslan, Feyza N. “Remodeling of E-Cadherin-Mediated Contacts via Cortical  Flows.” Institute of Science and Technology Austria, 2022. https://doi.org/10.15479/at:ista:12153. ieee: F. N. Arslan, “Remodeling of E-cadherin-mediated contacts via cortical  flows,” Institute of Science and Technology Austria, 2022. ista: Arslan FN. 2022. Remodeling of E-cadherin-mediated contacts via cortical  flows. Institute of Science and Technology Austria. mla: Arslan, Feyza N. Remodeling of E-Cadherin-Mediated Contacts via Cortical  Flows. Institute of Science and Technology Austria, 2022, doi:10.15479/at:ista:12153. short: F.N. Arslan, Remodeling of E-Cadherin-Mediated Contacts via Cortical  Flows, Institute of Science and Technology Austria, 2022. date_created: 2023-01-25T10:43:24Z date_published: 2022-09-29T00:00:00Z date_updated: 2023-08-08T13:14:10Z day: '29' ddc: - '570' degree_awarded: PhD department: - _id: GradSch - _id: CaHe doi: 10.15479/at:ista:12153 ec_funded: 1 file: - access_level: open_access checksum: e54a3e69b83ebf166544164afd25608e content_type: application/pdf creator: cchlebak date_created: 2023-01-25T10:52:46Z date_updated: 2023-01-25T10:52:46Z file_id: '12369' file_name: THESIS_FINAL_FArslan_pdfa.pdf file_size: 14581024 relation: main_file success: 1 file_date_updated: 2023-01-25T10:52:46Z has_accepted_license: '1' language: - iso: eng month: '09' oa: 1 oa_version: Published Version page: '113' project: - _id: 260F1432-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '742573' name: Interaction and feedback between cell mechanics and fate specification in vertebrate gastrulation publication_identifier: isbn: - ' 978-3-99078-025-1 ' issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '9350' relation: part_of_dissertation status: public status: public supervisor: - first_name: Carl-Philipp J full_name: Heisenberg, Carl-Philipp J id: 39427864-F248-11E8-B48F-1D18A9856A87 last_name: Heisenberg orcid: 0000-0002-0912-4566 title: Remodeling of E-cadherin-mediated contacts via cortical flows tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: dissertation user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2022' ... --- _id: '8909' abstract: - lang: eng text: Spin qubits are considered to be among the most promising candidates for building a quantum processor. Group IV hole spin qubits have moved into the focus of interest due to the ease of operation and compatibility with Si technology. In addition, Ge offers the option for monolithic superconductor-semiconductor integration. Here we demonstrate a hole spin qubit operating at fields below 10 mT, the critical field of Al, by exploiting the large out-of-plane hole g-factors in planar Ge and by encoding the qubit into the singlet-triplet states of a double quantum dot. We observe electrically controlled X and Z-rotations with tunable frequencies exceeding 100 MHz and dephasing times of 1μs which we extend beyond 15μs with echo techniques. These results show that Ge hole singlet triplet qubits outperform their electronic Si and GaAs based counterparts in speed and coherence, respectively. In addition, they are on par with Ge single spin qubits, but can be operated at much lower fields underlining their potential for on chip integration with superconducting technologies. acknowledged_ssus: - _id: M-Shop - _id: NanoFab acknowledgement: This research was supported by the Scientific Service Units of Institute of Science and Technology (IST) Austria through resources provided by the Miba Machine Shop and the nanofabrication facility, and was made possible with the support of the NOMIS Foundation. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant agreements no. 844511 and no. 75441, and by the Austrian Science Fund FWF-P 30207 project. A.B. acknowledges support from the European Union Horizon 2020 FET project microSPIRE, no. 766955. M. Botifoll and J.A. acknowledge funding from Generalitat de Catalunya 2017 SGR 327. The Catalan Institute of Nanoscience and Nanotechnology (ICN2) is supported by the Severo Ochoa programme from the Spanish Ministery of Economy (MINECO) (grant no. SEV-2017-0706) and is funded by the Catalonian Research Centre (CERCA) Programme, Generalitat de Catalunya. Part of the present work has been performed within the framework of the Universitat Autónoma de Barcelona Materials Science PhD programme. Part of the HAADF scanning transmission electron microscopy was conducted in the Laboratorio de Microscopias Avanzadas at Instituto de Nanociencia de Aragon, Universidad de Zaragoza. ICN2 acknowledge support from the Spanish Superior Council of Scientific Research (CSIC) Research Platform on Quantum Technologies PTI-001. M.B. acknowledges funding from the Catalan Agency for Management of University and Research Grants (AGAUR) Generalitat de Catalunya formation of investigators (FI) PhD grant. article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Daniel full_name: Jirovec, Daniel id: 4C473F58-F248-11E8-B48F-1D18A9856A87 last_name: Jirovec orcid: 0000-0002-7197-4801 - first_name: Andrea C full_name: Hofmann, Andrea C id: 340F461A-F248-11E8-B48F-1D18A9856A87 last_name: Hofmann - first_name: Andrea full_name: Ballabio, Andrea last_name: Ballabio - first_name: Philipp M. full_name: Mutter, Philipp M. last_name: Mutter - first_name: Giulio full_name: Tavani, Giulio last_name: Tavani - first_name: Marc full_name: Botifoll, Marc last_name: Botifoll - first_name: Alessandro full_name: Crippa, Alessandro id: 1F2B21A2-F6E7-11E9-9B82-F7DBE5697425 last_name: Crippa orcid: 0000-0002-2968-611X - first_name: Josip full_name: Kukucka, Josip id: 3F5D8856-F248-11E8-B48F-1D18A9856A87 last_name: Kukucka - first_name: Oliver full_name: Sagi, Oliver id: 71616374-A8E9-11E9-A7CA-09ECE5697425 last_name: Sagi - first_name: Frederico full_name: Martins, Frederico id: 38F80F9A-1CB8-11EA-BC76-B49B3DDC885E last_name: Martins orcid: 0000-0003-2668-2401 - first_name: Jaime full_name: Saez Mollejo, Jaime id: e0390f72-f6e0-11ea-865d-862393336714 last_name: Saez Mollejo - first_name: Ivan full_name: Prieto Gonzalez, Ivan id: 2A307FE2-F248-11E8-B48F-1D18A9856A87 last_name: Prieto Gonzalez orcid: 0000-0002-7370-5357 - first_name: Maksim full_name: Borovkov, Maksim id: 2ac7a0a2-3562-11eb-9256-fbd18ea55087 last_name: Borovkov - first_name: Jordi full_name: Arbiol, Jordi last_name: Arbiol - first_name: Daniel full_name: Chrastina, Daniel last_name: Chrastina - first_name: Giovanni full_name: Isella, Giovanni last_name: Isella - first_name: Georgios full_name: Katsaros, Georgios id: 38DB5788-F248-11E8-B48F-1D18A9856A87 last_name: Katsaros orcid: 0000-0001-8342-202X citation: ama: Jirovec D, Hofmann AC, Ballabio A, et al. A singlet triplet hole spin qubit in planar Ge. Nature Materials. 2021;20(8):1106–1112. doi:10.1038/s41563-021-01022-2 apa: Jirovec, D., Hofmann, A. C., Ballabio, A., Mutter, P. M., Tavani, G., Botifoll, M., … Katsaros, G. (2021). A singlet triplet hole spin qubit in planar Ge. Nature Materials. Springer Nature. https://doi.org/10.1038/s41563-021-01022-2 chicago: Jirovec, Daniel, Andrea C Hofmann, Andrea Ballabio, Philipp M. Mutter, Giulio Tavani, Marc Botifoll, Alessandro Crippa, et al. “A Singlet Triplet Hole Spin Qubit in Planar Ge.” Nature Materials. Springer Nature, 2021. https://doi.org/10.1038/s41563-021-01022-2. ieee: D. Jirovec et al., “A singlet triplet hole spin qubit in planar Ge,” Nature Materials, vol. 20, no. 8. Springer Nature, pp. 1106–1112, 2021. ista: Jirovec D, Hofmann AC, Ballabio A, Mutter PM, Tavani G, Botifoll M, Crippa A, Kukucka J, Sagi O, Martins F, Saez Mollejo J, Prieto Gonzalez I, Borovkov M, Arbiol J, Chrastina D, Isella G, Katsaros G. 2021. A singlet triplet hole spin qubit in planar Ge. Nature Materials. 20(8), 1106–1112. mla: Jirovec, Daniel, et al. “A Singlet Triplet Hole Spin Qubit in Planar Ge.” Nature Materials, vol. 20, no. 8, Springer Nature, 2021, pp. 1106–1112, doi:10.1038/s41563-021-01022-2. short: D. Jirovec, A.C. Hofmann, A. Ballabio, P.M. Mutter, G. Tavani, M. Botifoll, A. Crippa, J. Kukucka, O. Sagi, F. Martins, J. Saez Mollejo, I. Prieto Gonzalez, M. Borovkov, J. Arbiol, D. Chrastina, G. Isella, G. Katsaros, Nature Materials 20 (2021) 1106–1112. date_created: 2020-12-02T10:50:47Z date_published: 2021-08-01T00:00:00Z date_updated: 2024-03-25T23:30:14Z day: '01' department: - _id: GeKa - _id: NanoFab - _id: GradSch doi: 10.1038/s41563-021-01022-2 ec_funded: 1 external_id: arxiv: - '2011.13755' isi: - '000657596400001' intvolume: ' 20' isi: 1 issue: '8' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2011.13755 month: '08' oa: 1 oa_version: Preprint page: 1106–1112 project: - _id: 26A151DA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '844511' name: Majorana bound states in Ge/SiGe heterostructures - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships - _id: 2641CE5E-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P30207 name: Hole spin orbit qubits in Ge quantum wells - _id: 262116AA-B435-11E9-9278-68D0E5697425 name: Hybrid Semiconductor - Superconductor Quantum Devices publication: Nature Materials publication_identifier: eissn: - 1476-4660 issn: - 1476-1122 publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: link: - description: News on IST Homepage relation: press_release url: https://ist.ac.at/en/news/quantum-computing-with-holes/ record: - id: '9323' relation: research_data status: public - id: '10058' relation: dissertation_contains status: public scopus_import: '1' status: public title: A singlet triplet hole spin qubit in planar Ge type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 20 year: '2021' ... --- _id: '8910' abstract: - lang: eng text: A semiconducting nanowire fully wrapped by a superconducting shell has been proposed as a platform for obtaining Majorana modes at small magnetic fields. In this study, we demonstrate that the appearance of subgap states in such structures is actually governed by the junction region in tunneling spectroscopy measurements and not the full-shell nanowire itself. Short tunneling regions never show subgap states, whereas longer junctions always do. This can be understood in terms of quantum dots forming in the junction and hosting Andreev levels in the Yu-Shiba-Rusinov regime. The intricate magnetic field dependence of the Andreev levels, through both the Zeeman and Little-Parks effects, may result in robust zero-bias peaks—features that could be easily misinterpreted as originating from Majorana zero modes but are unrelated to topological superconductivity. acknowledged_ssus: - _id: M-Shop - _id: NanoFab acknowledgement: The authors thank A. Higginbotham, E. J. H. Lee and F. R. Martins for helpful discussions. This research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA Machine Shop and the nanofabrication facility; the NOMIS Foundation and Microsoft; the European Union’s Horizon 2020 research and innovation program under the Marie SklodowskaCurie grant agreement No 844511; the FETOPEN Grant Agreement No. 828948; the European Research Commission through the grant agreement HEMs-DAM No 716655; the Spanish Ministry of Science and Innovation through Grants PGC2018-097018-B-I00, PCI2018-093026, FIS2016-80434-P (AEI/FEDER, EU), RYC2011-09345 (Ram´on y Cajal Programme), and the Mar´ıa de Maeztu Programme for Units of Excellence in R&D (CEX2018-000805-M); the CSIC Research Platform on Quantum Technologies PTI-001. article_number: 82-88 article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Marco full_name: Valentini, Marco id: C0BB2FAC-D767-11E9-B658-BC13E6697425 last_name: Valentini - first_name: Fernando full_name: Peñaranda, Fernando last_name: Peñaranda - first_name: Andrea C full_name: Hofmann, Andrea C id: 340F461A-F248-11E8-B48F-1D18A9856A87 last_name: Hofmann - first_name: Matthias full_name: Brauns, Matthias id: 33F94E3C-F248-11E8-B48F-1D18A9856A87 last_name: Brauns - first_name: Robert full_name: Hauschild, Robert id: 4E01D6B4-F248-11E8-B48F-1D18A9856A87 last_name: Hauschild orcid: 0000-0001-9843-3522 - first_name: Peter full_name: Krogstrup, Peter last_name: Krogstrup - first_name: Pablo full_name: San-Jose, Pablo last_name: San-Jose - first_name: Elsa full_name: Prada, Elsa last_name: Prada - first_name: Ramón full_name: Aguado, Ramón last_name: Aguado - first_name: Georgios full_name: Katsaros, Georgios id: 38DB5788-F248-11E8-B48F-1D18A9856A87 last_name: Katsaros orcid: 0000-0001-8342-202X citation: ama: Valentini M, Peñaranda F, Hofmann AC, et al. Nontopological zero-bias peaks in full-shell nanowires induced by flux-tunable Andreev states. Science. 2021;373(6550). doi:10.1126/science.abf1513 apa: Valentini, M., Peñaranda, F., Hofmann, A. C., Brauns, M., Hauschild, R., Krogstrup, P., … Katsaros, G. (2021). Nontopological zero-bias peaks in full-shell nanowires induced by flux-tunable Andreev states. Science. American Association for the Advancement of Science. https://doi.org/10.1126/science.abf1513 chicago: Valentini, Marco, Fernando Peñaranda, Andrea C Hofmann, Matthias Brauns, Robert Hauschild, Peter Krogstrup, Pablo San-Jose, Elsa Prada, Ramón Aguado, and Georgios Katsaros. “Nontopological Zero-Bias Peaks in Full-Shell Nanowires Induced by Flux-Tunable Andreev States.” Science. American Association for the Advancement of Science, 2021. https://doi.org/10.1126/science.abf1513. ieee: M. Valentini et al., “Nontopological zero-bias peaks in full-shell nanowires induced by flux-tunable Andreev states,” Science, vol. 373, no. 6550. American Association for the Advancement of Science, 2021. ista: Valentini M, Peñaranda F, Hofmann AC, Brauns M, Hauschild R, Krogstrup P, San-Jose P, Prada E, Aguado R, Katsaros G. 2021. Nontopological zero-bias peaks in full-shell nanowires induced by flux-tunable Andreev states. Science. 373(6550), 82–88. mla: Valentini, Marco, et al. “Nontopological Zero-Bias Peaks in Full-Shell Nanowires Induced by Flux-Tunable Andreev States.” Science, vol. 373, no. 6550, 82–88, American Association for the Advancement of Science, 2021, doi:10.1126/science.abf1513. short: M. Valentini, F. Peñaranda, A.C. Hofmann, M. Brauns, R. Hauschild, P. Krogstrup, P. San-Jose, E. Prada, R. Aguado, G. Katsaros, Science 373 (2021). date_created: 2020-12-02T10:51:52Z date_published: 2021-07-02T00:00:00Z date_updated: 2024-02-21T12:40:09Z day: '02' department: - _id: GeKa - _id: Bio doi: 10.1126/science.abf1513 ec_funded: 1 external_id: arxiv: - '2008.02348' isi: - '000677843100034' intvolume: ' 373' isi: 1 issue: '6550' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2008.02348 month: '07' oa: 1 oa_version: Submitted Version project: - _id: 262116AA-B435-11E9-9278-68D0E5697425 name: Hybrid Semiconductor - Superconductor Quantum Devices - _id: 26A151DA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '844511' name: Majorana bound states in Ge/SiGe heterostructures publication: Science publication_identifier: eissn: - '10959203' issn: - '00368075' publication_status: published publisher: American Association for the Advancement of Science quality_controlled: '1' related_material: link: - description: News on IST Homepage relation: press_release url: https://ist.ac.at/en/news/unfinding-a-split-electron/ record: - id: '13286' relation: dissertation_contains status: public - id: '9389' relation: research_data status: public scopus_import: '1' status: public title: Nontopological zero-bias peaks in full-shell nanowires induced by flux-tunable Andreev states type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 373 year: '2021' ... --- _id: '9389' abstract: - lang: eng text: "This .zip File contains the transport data for \"Non-topological zero bias peaks in full-shell nanowires induced by flux tunable Andreev states\" by M. Valentini, et. al. \r\nThe measurements were done using Labber Software and the data is stored in the hdf5 file format.\r\nInstructions of how to read the data are in \"Notebook_Valentini.pdf\"." acknowledged_ssus: - _id: NanoFab article_processing_charge: No author: - first_name: Marco full_name: Valentini, Marco id: C0BB2FAC-D767-11E9-B658-BC13E6697425 last_name: Valentini citation: ama: Valentini M. Research data for “Non-topological zero bias peaks in full-shell nanowires induced by flux tunable Andreev states.” 2021. doi:10.15479/AT:ISTA:9389 apa: Valentini, M. (2021). Research data for “Non-topological zero bias peaks in full-shell nanowires induced by flux tunable Andreev states.” Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:9389 chicago: Valentini, Marco. “Research Data for ‘Non-Topological Zero Bias Peaks in Full-Shell Nanowires Induced by Flux Tunable Andreev States.’” Institute of Science and Technology Austria, 2021. https://doi.org/10.15479/AT:ISTA:9389. ieee: M. Valentini, “Research data for ‘Non-topological zero bias peaks in full-shell nanowires induced by flux tunable Andreev states.’” Institute of Science and Technology Austria, 2021. ista: Valentini M. 2021. Research data for ‘Non-topological zero bias peaks in full-shell nanowires induced by flux tunable Andreev states’, Institute of Science and Technology Austria, 10.15479/AT:ISTA:9389. mla: Valentini, Marco. Research Data for “Non-Topological Zero Bias Peaks in Full-Shell Nanowires Induced by Flux Tunable Andreev States.” Institute of Science and Technology Austria, 2021, doi:10.15479/AT:ISTA:9389. short: M. Valentini, (2021). contributor: - contributor_type: contact_person first_name: Marco id: C0BB2FAC-D767-11E9-B658-BC13E6697425 last_name: Valentini date_created: 2021-05-14T12:07:53Z date_published: 2021-01-01T00:00:00Z date_updated: 2024-02-21T12:40:09Z ddc: - '530' department: - _id: GradSch - _id: GeKa doi: 10.15479/AT:ISTA:9389 file: - access_level: open_access checksum: 80a905c4eef24dab6fb247e81a3d67f5 content_type: application/pdf creator: mvalenti date_created: 2021-05-14T11:42:23Z date_updated: 2021-05-14T11:42:23Z file_id: '9390' file_name: Notebook_Valentini.pdf file_size: 10572981 relation: main_file - access_level: open_access checksum: 1e61a7e63949448a8db0091cdac23570 content_type: application/x-zip-compressed creator: mvalenti date_created: 2021-05-14T11:56:48Z date_updated: 2021-05-14T11:56:48Z file_id: '9391' file_name: Experimental_data.zip file_size: 99076111 relation: main_file file_date_updated: 2021-05-14T11:56:48Z has_accepted_license: '1' license: https://creativecommons.org/publicdomain/zero/1.0/ oa: 1 oa_version: Published Version publisher: Institute of Science and Technology Austria related_material: record: - id: '8910' relation: used_in_publication status: public status: public title: Research data for "Non-topological zero bias peaks in full-shell nanowires induced by flux tunable Andreev states" tmp: image: /images/cc_0.png legal_code_url: https://creativecommons.org/publicdomain/zero/1.0/legalcode name: Creative Commons Public Domain Dedication (CC0 1.0) short: CC0 (1.0) type: research_data user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2021' ... --- _id: '9623' abstract: - lang: eng text: "Cytoplasmic reorganizations are essential for morphogenesis. In large cells like oocytes, these reorganizations become crucial in patterning the oocyte for later stages of embryonic development. Ascidians oocytes reorganize their cytoplasm (ooplasm) in a spectacular manner. Ooplasmic reorganization is initiated at fertilization with the contraction of the actomyosin cortex along the animal-vegetal axis of the oocyte, driving the accumulation of cortical endoplasmic reticulum (cER), maternal mRNAs associated to it and a mitochondria-rich subcortical layer – the myoplasm – in a region of the vegetal pole termed contraction pole (CP). Here we have used the species Phallusia mammillata to investigate the changes in cell shape that accompany these reorganizations and the mechanochemical mechanisms underlining CP formation.\r\nWe report that the length of the animal-vegetal (AV) axis oscillates upon fertilization: it first undergoes a cycle of fast elongation-lengthening followed by a slow expansion of mainly the vegetal pole (VP) of the cell. We show that the fast oscillation corresponds to a dynamic polarization of the actin cortex as a result of a fertilization-induced increase in cortical tension in the oocyte that triggers a rupture of the cortex at the animal pole and the establishment of vegetal-directed cortical flows. These flows are responsible for the vegetal accumulation of actin causing the VP to flatten. \r\nWe find that the slow expansion of the VP, leading to CP formation, correlates with a relaxation of the vegetal cortex and that the myoplasm plays a role in the expansion. We show that the myoplasm is a solid-like layer that buckles under compression forces arising from the contracting actin cortex at the VP. Straightening of the myoplasm when actin flows stops, facilitates the expansion of the VP and the CP. Altogether, our results present a previously unrecognized role for the myoplasm in ascidian ooplasmic segregation. \r\n" acknowledged_ssus: - _id: Bio - _id: EM-Fac - _id: NanoFab - _id: M-Shop alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Silvia full_name: Caballero Mancebo, Silvia id: 2F1E1758-F248-11E8-B48F-1D18A9856A87 last_name: Caballero Mancebo orcid: 0000-0002-5223-3346 citation: ama: Caballero Mancebo S. Fertilization-induced deformations are controlled by the actin cortex and a mitochondria-rich subcortical layer in ascidian oocytes. 2021. doi:10.15479/at:ista:9623 apa: Caballero Mancebo, S. (2021). Fertilization-induced deformations are controlled by the actin cortex and a mitochondria-rich subcortical layer in ascidian oocytes. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:9623 chicago: Caballero Mancebo, Silvia. “Fertilization-Induced Deformations Are Controlled by the Actin Cortex and a Mitochondria-Rich Subcortical Layer in Ascidian Oocytes.” Institute of Science and Technology Austria, 2021. https://doi.org/10.15479/at:ista:9623. ieee: S. Caballero Mancebo, “Fertilization-induced deformations are controlled by the actin cortex and a mitochondria-rich subcortical layer in ascidian oocytes,” Institute of Science and Technology Austria, 2021. ista: Caballero Mancebo S. 2021. Fertilization-induced deformations are controlled by the actin cortex and a mitochondria-rich subcortical layer in ascidian oocytes. Institute of Science and Technology Austria. mla: Caballero Mancebo, Silvia. Fertilization-Induced Deformations Are Controlled by the Actin Cortex and a Mitochondria-Rich Subcortical Layer in Ascidian Oocytes. Institute of Science and Technology Austria, 2021, doi:10.15479/at:ista:9623. short: S. Caballero Mancebo, Fertilization-Induced Deformations Are Controlled by the Actin Cortex and a Mitochondria-Rich Subcortical Layer in Ascidian Oocytes, Institute of Science and Technology Austria, 2021. date_created: 2021-07-01T14:50:17Z date_published: 2021-07-01T00:00:00Z date_updated: 2023-09-07T13:33:27Z ddc: - '570' degree_awarded: PhD department: - _id: GradSch - _id: CaHe doi: 10.15479/at:ista:9623 file: - access_level: closed checksum: e039225a47ef32666d59bf35ddd30ecf content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: scaballe date_created: 2021-07-01T14:48:54Z date_updated: 2022-07-02T22:30:06Z embargo_to: open_access file_id: '9624' file_name: PhDThesis_SCM.docx file_size: 131946790 relation: source_file - access_level: open_access checksum: dd4d78962ea94ad95e97ca7d9af08f4b content_type: application/pdf creator: scaballe date_created: 2021-07-01T14:46:25Z date_updated: 2022-07-02T22:30:06Z embargo: 2022-07-01 file_id: '9625' file_name: PhDThesis_SCM.pdf file_size: 17094958 relation: main_file file_date_updated: 2022-07-02T22:30:06Z has_accepted_license: '1' language: - iso: eng license: https://creativecommons.org/licenses/by-nc-nd/4.0/ month: '07' oa: 1 oa_version: Published Version page: '111' publication_identifier: isbn: - 978-3-99078-012-1 issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '9750' relation: part_of_dissertation status: public - id: '9006' relation: part_of_dissertation status: public status: public supervisor: - first_name: Carl-Philipp J full_name: Heisenberg, Carl-Philipp J id: 39427864-F248-11E8-B48F-1D18A9856A87 last_name: Heisenberg orcid: 0000-0002-0912-4566 title: Fertilization-induced deformations are controlled by the actin cortex and a mitochondria-rich subcortical layer in ascidian oocytes tmp: image: /images/cc_by_nc_nd.png legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) short: CC BY-NC-ND (4.0) type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2021' ... --- _id: '10029' abstract: - lang: eng text: Superconductor-semiconductor hybrids are platforms for realizing effective p-wave superconductivity. Spin-orbit coupling, combined with the proximity effect, causes the two-dimensional semiconductor to inherit p±ip intraband pairing, and application of magnetic field can then result in transitions to the normal state, partial Bogoliubov Fermi surfaces, or topological phases with Majorana modes. Experimentally probing the hybrid superconductor-semiconductor interface is challenging due to the shunting effect of the conventional superconductor. Consequently, the nature of induced pairing remains an open question. Here, we use the circuit quantum electrodynamics architecture to probe induced superconductivity in a two dimensional Al-InAs hybrid system. We observe a strong suppression of superfluid density and enhanced dissipation driven by magnetic field, which cannot be accounted for by the depairing theory of an s-wave superconductor. These observations are explained by a picture of independent intraband p±ip superconductors giving way to partial Bogoliubov Fermi surfaces, and allow for the first characterization of key properties of the hybrid superconducting system. acknowledged_ssus: - _id: M-Shop - _id: NanoFab acknowledgement: This research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA Machine Shop and the nanofabrication facility. JS and AG were supported by funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement No.754411. article_number: '2107.03695' article_processing_charge: No arxiv: 1 author: - first_name: Duc T full_name: Phan, Duc T id: 29C8C0B4-F248-11E8-B48F-1D18A9856A87 last_name: Phan - first_name: Jorden L full_name: Senior, Jorden L id: 5479D234-2D30-11EA-89CC-40953DDC885E last_name: Senior orcid: 0000-0002-0672-9295 - first_name: Areg full_name: Ghazaryan, Areg id: 4AF46FD6-F248-11E8-B48F-1D18A9856A87 last_name: Ghazaryan orcid: 0000-0001-9666-3543 - first_name: M. full_name: Hatefipour, M. last_name: Hatefipour - first_name: W. M. full_name: Strickland, W. M. last_name: Strickland - first_name: J. full_name: Shabani, J. last_name: Shabani - first_name: Maksym full_name: Serbyn, Maksym id: 47809E7E-F248-11E8-B48F-1D18A9856A87 last_name: Serbyn orcid: 0000-0002-2399-5827 - first_name: Andrew P full_name: Higginbotham, Andrew P id: 4AD6785A-F248-11E8-B48F-1D18A9856A87 last_name: Higginbotham orcid: 0000-0003-2607-2363 citation: ama: Phan DT, Senior JL, Ghazaryan A, et al. Breakdown of induced p±ip pairing in a superconductor-semiconductor hybrid. arXiv. apa: Phan, D. T., Senior, J. L., Ghazaryan, A., Hatefipour, M., Strickland, W. M., Shabani, J., … Higginbotham, A. P. (n.d.). Breakdown of induced p±ip pairing in a superconductor-semiconductor hybrid. arXiv. chicago: Phan, Duc T, Jorden L Senior, Areg Ghazaryan, M. Hatefipour, W. M. Strickland, J. Shabani, Maksym Serbyn, and Andrew P Higginbotham. “Breakdown of Induced P±ip Pairing in a Superconductor-Semiconductor Hybrid.” ArXiv, n.d. ieee: D. T. Phan et al., “Breakdown of induced p±ip pairing in a superconductor-semiconductor hybrid,” arXiv. . ista: Phan DT, Senior JL, Ghazaryan A, Hatefipour M, Strickland WM, Shabani J, Serbyn M, Higginbotham AP. Breakdown of induced p±ip pairing in a superconductor-semiconductor hybrid. arXiv, 2107.03695. mla: Phan, Duc T., et al. “Breakdown of Induced P±ip Pairing in a Superconductor-Semiconductor Hybrid.” ArXiv, 2107.03695. short: D.T. Phan, J.L. Senior, A. Ghazaryan, M. Hatefipour, W.M. Strickland, J. Shabani, M. Serbyn, A.P. Higginbotham, ArXiv (n.d.). date_created: 2021-09-21T08:41:02Z date_published: 2021-07-08T00:00:00Z date_updated: 2024-02-21T12:36:52Z day: '08' department: - _id: MaSe - _id: AnHi - _id: MiLe ec_funded: 1 external_id: arxiv: - '2107.03695' language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2107.03695 month: '07' oa: 1 oa_version: Preprint project: - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships publication: arXiv publication_status: submitted related_material: record: - id: '10851' relation: later_version status: public - id: '9636' relation: research_data status: public status: public title: Breakdown of induced p±ip pairing in a superconductor-semiconductor hybrid type: preprint user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2021' ... --- _id: '10030' abstract: - lang: eng text: "This PhD thesis is primarily focused on the study of discrete transport problems, introduced for the first time in the seminal works of Maas [Maa11] and Mielke [Mie11] on finite state Markov chains and reaction-diffusion equations, respectively. More in detail, my research focuses on the study of transport costs on graphs, in particular the convergence and the stability of such problems in the discrete-to-continuum limit. This thesis also includes some results concerning\r\nnon-commutative optimal transport. The first chapter of this thesis consists of a general introduction to the optimal transport problems, both in the discrete, the continuous, and the non-commutative setting. Chapters 2 and 3 present the content of two works, obtained in collaboration with Peter Gladbach, Eva Kopfer, and Jan Maas, where we have been able to show the convergence of discrete transport costs on periodic graphs to suitable continuous ones, which can be described by means of a homogenisation result. We first focus on the particular case of quadratic costs on the real line and then extending the result to more general costs in arbitrary dimension. Our results are the first complete characterisation of limits of transport costs on periodic graphs in arbitrary dimension which do not rely on any additional symmetry. In Chapter 4 we turn our attention to one of the intriguing connection between evolution equations and optimal transport, represented by the theory of gradient flows. We show that discrete gradient flow structures associated to a finite volume approximation of a certain class of diffusive equations (Fokker–Planck) is stable in the limit of vanishing meshes, reproving the convergence of the scheme via the method of evolutionary Γ-convergence and exploiting a more variational point of view on the problem. This is based on a collaboration with Dominik Forkert and Jan Maas. Chapter 5 represents a change of perspective, moving away from the discrete world and reaching the non-commutative one. As in the discrete case, we discuss how classical tools coming from the commutative optimal transport can be translated into the setting of density matrices. In particular, in this final chapter we present a non-commutative version of the Schrödinger problem (or entropic regularised optimal transport problem) and discuss existence and characterisation of minimisers, a duality result, and present a non-commutative version of the well-known Sinkhorn algorithm to compute the above mentioned optimisers. This is based on a joint work with Dario Feliciangeli and Augusto Gerolin. Finally, Appendix A and B contain some additional material and discussions, with particular attention to Harnack inequalities and the regularity of flows on discrete spaces." acknowledged_ssus: - _id: M-Shop - _id: NanoFab acknowledgement: The author gratefully acknowledges support by the Austrian Science Fund (FWF), grants No W1245. alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Lorenzo full_name: Portinale, Lorenzo id: 30AD2CBC-F248-11E8-B48F-1D18A9856A87 last_name: Portinale citation: ama: Portinale L. Discrete-to-continuum limits of transport problems and gradient flows in the space of measures. 2021. doi:10.15479/at:ista:10030 apa: Portinale, L. (2021). Discrete-to-continuum limits of transport problems and gradient flows in the space of measures. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:10030 chicago: Portinale, Lorenzo. “Discrete-to-Continuum Limits of Transport Problems and Gradient Flows in the Space of Measures.” Institute of Science and Technology Austria, 2021. https://doi.org/10.15479/at:ista:10030. ieee: L. Portinale, “Discrete-to-continuum limits of transport problems and gradient flows in the space of measures,” Institute of Science and Technology Austria, 2021. ista: Portinale L. 2021. Discrete-to-continuum limits of transport problems and gradient flows in the space of measures. Institute of Science and Technology Austria. mla: Portinale, Lorenzo. Discrete-to-Continuum Limits of Transport Problems and Gradient Flows in the Space of Measures. Institute of Science and Technology Austria, 2021, doi:10.15479/at:ista:10030. short: L. Portinale, Discrete-to-Continuum Limits of Transport Problems and Gradient Flows in the Space of Measures, Institute of Science and Technology Austria, 2021. date_created: 2021-09-21T09:14:15Z date_published: 2021-09-22T00:00:00Z date_updated: 2023-09-07T13:31:06Z day: '22' ddc: - '515' degree_awarded: PhD department: - _id: GradSch - _id: JaMa doi: 10.15479/at:ista:10030 file: - access_level: closed checksum: 8cd60dcb8762e8f21867e21e8001e183 content_type: application/x-zip-compressed creator: cchlebak date_created: 2021-09-21T09:17:34Z date_updated: 2022-03-10T12:14:42Z file_id: '10032' file_name: tex_and_pictures.zip file_size: 3876668 relation: source_file - access_level: open_access checksum: 9789e9d967c853c1503ec7f307170279 content_type: application/pdf creator: cchlebak date_created: 2021-09-27T11:14:31Z date_updated: 2021-09-27T11:14:31Z file_id: '10047' file_name: thesis_portinale_Final (1).pdf file_size: 2532673 relation: main_file file_date_updated: 2022-03-10T12:14:42Z has_accepted_license: '1' language: - iso: eng month: '09' oa: 1 oa_version: Published Version project: - _id: 260788DE-B435-11E9-9278-68D0E5697425 call_identifier: FWF name: Dissipation and Dispersion in Nonlinear Partial Differential Equations - _id: fc31cba2-9c52-11eb-aca3-ff467d239cd2 grant_number: F6504 name: Taming Complexity in Partial Differential Systems publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '10022' relation: part_of_dissertation status: public - id: '9792' relation: part_of_dissertation status: public - id: '7573' relation: part_of_dissertation status: public status: public supervisor: - first_name: Jan full_name: Maas, Jan id: 4C5696CE-F248-11E8-B48F-1D18A9856A87 last_name: Maas orcid: 0000-0002-0845-1338 title: Discrete-to-continuum limits of transport problems and gradient flows in the space of measures tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2021' ... --- _id: '10058' abstract: - lang: eng text: 'Quantum information and computation has become a vast field paved with opportunities for researchers and investors. As large multinational companies and international funds are heavily investing in quantum technologies it is still a question which platform is best suited for the task of realizing a scalable quantum processor. In this work we investigate hole spins in Ge quantum wells. These hold great promise as they possess several favorable properties: a small effective mass, a strong spin-orbit coupling, long relaxation time and an inherent immunity to hyperfine noise. All these characteristics helped Ge hole spin qubits to evolve from a single qubit to a fully entangled four qubit processor in only 3 years. Here, we investigated a qubit approach leveraging the large out-of-plane g-factors of heavy hole states in Ge quantum dots. We found this qubit to be reproducibly operable at extremely low magnetic field and at large speeds while maintaining coherence. This was possible because large differences of g-factors in adjacent dots can be achieved in the out-of-plane direction. In the in-plane direction the small g-factors, on the other hand, can be altered very effectively by the confinement potentials. Here, we found that this can even lead to a sign change of the g-factors. The resulting g-factor difference alters the dynamics of the system drastically and produces effects typically attributed to a spin-orbit induced spin-flip term. The investigations carried out in this thesis give further insights into the possibilities of holes in Ge and reveal new physical properties that need to be considered when designing future spin qubit experiments.' acknowledged_ssus: - _id: M-Shop - _id: NanoFab acknowledgement: The author gratefully acknowledges support by the Austrian Science Fund (FWF), grants No P30207, and the Nomis foundation. alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Daniel full_name: Jirovec, Daniel id: 4C473F58-F248-11E8-B48F-1D18A9856A87 last_name: Jirovec orcid: 0000-0002-7197-4801 citation: ama: Jirovec D. Singlet-Triplet qubits and spin-orbit interaction in 2-dimensional Ge hole gases. 2021. doi:10.15479/at:ista:10058 apa: Jirovec, D. (2021). Singlet-Triplet qubits and spin-orbit interaction in 2-dimensional Ge hole gases. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:10058 chicago: Jirovec, Daniel. “Singlet-Triplet Qubits and Spin-Orbit Interaction in 2-Dimensional Ge Hole Gases.” Institute of Science and Technology Austria, 2021. https://doi.org/10.15479/at:ista:10058. ieee: D. Jirovec, “Singlet-Triplet qubits and spin-orbit interaction in 2-dimensional Ge hole gases,” Institute of Science and Technology Austria, 2021. ista: Jirovec D. 2021. Singlet-Triplet qubits and spin-orbit interaction in 2-dimensional Ge hole gases. Institute of Science and Technology Austria. mla: Jirovec, Daniel. Singlet-Triplet Qubits and Spin-Orbit Interaction in 2-Dimensional Ge Hole Gases. Institute of Science and Technology Austria, 2021, doi:10.15479/at:ista:10058. short: D. Jirovec, Singlet-Triplet Qubits and Spin-Orbit Interaction in 2-Dimensional Ge Hole Gases, Institute of Science and Technology Austria, 2021. date_created: 2021-09-30T07:53:49Z date_published: 2021-10-05T00:00:00Z date_updated: 2023-09-08T11:41:08Z day: '05' ddc: - '621' - '539' degree_awarded: PhD department: - _id: GradSch - _id: GeKa doi: 10.15479/at:ista:10058 file: - access_level: closed checksum: ad6bcb24083ed7c02baaf1885c9ea3d5 content_type: application/x-zip-compressed creator: djirovec date_created: 2021-09-30T14:29:14Z date_updated: 2022-12-20T23:30:07Z embargo_to: open_access file_id: '10061' file_name: PHD_Thesis_Jirovec_Source.zip file_size: 32397600 relation: source_file - access_level: open_access checksum: 5fbe08d4f66d1153e04c47971538fae8 content_type: application/pdf creator: djirovec date_created: 2021-10-05T07:56:49Z date_updated: 2022-12-20T23:30:07Z embargo: 2022-10-06 file_id: '10087' file_name: PHD_Thesis_pdfa2b_1.pdf file_size: 26910829 relation: main_file file_date_updated: 2022-12-20T23:30:07Z has_accepted_license: '1' keyword: - qubits - quantum computing - holes language: - iso: eng month: '10' oa: 1 oa_version: Published Version page: '151' project: - _id: 2641CE5E-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P30207 name: Hole spin orbit qubits in Ge quantum wells publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '8831' relation: part_of_dissertation status: public - id: '10065' relation: part_of_dissertation status: public - id: '10066' relation: part_of_dissertation status: public - id: '8909' relation: part_of_dissertation status: public - id: '5816' relation: part_of_dissertation status: public status: public supervisor: - first_name: Georgios full_name: Katsaros, Georgios id: 38DB5788-F248-11E8-B48F-1D18A9856A87 last_name: Katsaros orcid: 0000-0001-8342-202X title: Singlet-Triplet qubits and spin-orbit interaction in 2-dimensional Ge hole gases tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2021' ... --- _id: '10066' abstract: - lang: eng text: The potential of Si and SiGe-based devices for the scaling of quantum circuits is tainted by device variability. Each device needs to be tuned to operation conditions. We give a key step towards tackling this variability with an algorithm that, without modification, is capable of tuning a 4-gate Si FinFET, a 5-gate GeSi nanowire and a 7-gate SiGe heterostructure double quantum dot device from scratch. We achieve tuning times of 30, 10, and 92 minutes, respectively. The algorithm also provides insight into the parameter space landscape for each of these devices. These results show that overarching solutions for the tuning of quantum devices are enabled by machine learning. acknowledged_ssus: - _id: NanoFab acknowledgement: "We acknowledge Ang Li, Erik P. A. M. Bakkers (University of Eindhoven) for the fabrication of the Ge/Si nanowire. This work was supported by the Royal Society, the EPSRC National Quantum Technology Hub in Networked Quantum Information Technology (EP/M013243/1), Quantum Technology Capital (EP/N014995/1), EPSRC Platform Grant\r\n(EP/R029229/1), the European Research Council (Grant agreement 948932), the Swiss Nanoscience Institute, the\r\nNCCR SPIN, the EU H2020 European Microkelvin Platform EMP grant No. 824109, the Scientific Service Units\r\nof IST Austria through resources provided by the nanofabrication facility and, the FWF-P30207 project. This publication was also made possible through support from Templeton World Charity Foundation and John Templeton Foundation. The opinions expressed in this publication are those of the authors and do not necessarily reflect the views of the Templeton Foundations." article_number: '2107.12975' article_processing_charge: No arxiv: 1 author: - first_name: B. full_name: Severin, B. last_name: Severin - first_name: D. T. full_name: Lennon, D. T. last_name: Lennon - first_name: L. C. full_name: Camenzind, L. C. last_name: Camenzind - first_name: F. full_name: Vigneau, F. last_name: Vigneau - first_name: F. full_name: Fedele, F. last_name: Fedele - first_name: Daniel full_name: Jirovec, Daniel id: 4C473F58-F248-11E8-B48F-1D18A9856A87 last_name: Jirovec orcid: 0000-0002-7197-4801 - first_name: A. full_name: Ballabio, A. last_name: Ballabio - first_name: D. full_name: Chrastina, D. last_name: Chrastina - first_name: G. full_name: Isella, G. last_name: Isella - first_name: M. de full_name: Kruijf, M. de last_name: Kruijf - first_name: M. J. full_name: Carballido, M. J. last_name: Carballido - first_name: S. full_name: Svab, S. last_name: Svab - first_name: A. V. full_name: Kuhlmann, A. V. last_name: Kuhlmann - first_name: F. R. full_name: Braakman, F. R. last_name: Braakman - first_name: S. full_name: Geyer, S. last_name: Geyer - first_name: F. N. M. full_name: Froning, F. N. M. last_name: Froning - first_name: H. full_name: Moon, H. last_name: Moon - first_name: M. A. full_name: Osborne, M. A. last_name: Osborne - first_name: D. full_name: Sejdinovic, D. last_name: Sejdinovic - first_name: Georgios full_name: Katsaros, Georgios id: 38DB5788-F248-11E8-B48F-1D18A9856A87 last_name: Katsaros orcid: 0000-0001-8342-202X - first_name: D. M. full_name: Zumbühl, D. M. last_name: Zumbühl - first_name: G. A. D. full_name: Briggs, G. A. D. last_name: Briggs - first_name: N. full_name: Ares, N. last_name: Ares citation: ama: Severin B, Lennon DT, Camenzind LC, et al. Cross-architecture tuning of silicon and SiGe-based quantum devices using machine learning. arXiv. doi:10.48550/arXiv.2107.12975 apa: Severin, B., Lennon, D. T., Camenzind, L. C., Vigneau, F., Fedele, F., Jirovec, D., … Ares, N. (n.d.). Cross-architecture tuning of silicon and SiGe-based quantum devices using machine learning. arXiv. https://doi.org/10.48550/arXiv.2107.12975 chicago: Severin, B., D. T. Lennon, L. C. Camenzind, F. Vigneau, F. Fedele, Daniel Jirovec, A. Ballabio, et al. “Cross-Architecture Tuning of Silicon and SiGe-Based Quantum Devices Using Machine Learning.” ArXiv, n.d. https://doi.org/10.48550/arXiv.2107.12975. ieee: B. Severin et al., “Cross-architecture tuning of silicon and SiGe-based quantum devices using machine learning,” arXiv. . ista: Severin B, Lennon DT, Camenzind LC, Vigneau F, Fedele F, Jirovec D, Ballabio A, Chrastina D, Isella G, Kruijf M de, Carballido MJ, Svab S, Kuhlmann AV, Braakman FR, Geyer S, Froning FNM, Moon H, Osborne MA, Sejdinovic D, Katsaros G, Zumbühl DM, Briggs GAD, Ares N. Cross-architecture tuning of silicon and SiGe-based quantum devices using machine learning. arXiv, 2107.12975. mla: Severin, B., et al. “Cross-Architecture Tuning of Silicon and SiGe-Based Quantum Devices Using Machine Learning.” ArXiv, 2107.12975, doi:10.48550/arXiv.2107.12975. short: B. Severin, D.T. Lennon, L.C. Camenzind, F. Vigneau, F. Fedele, D. Jirovec, A. Ballabio, D. Chrastina, G. Isella, M. de Kruijf, M.J. Carballido, S. Svab, A.V. Kuhlmann, F.R. Braakman, S. Geyer, F.N.M. Froning, H. Moon, M.A. Osborne, D. Sejdinovic, G. Katsaros, D.M. Zumbühl, G.A.D. Briggs, N. Ares, ArXiv (n.d.). date_created: 2021-10-01T12:40:22Z date_published: 2021-07-27T00:00:00Z date_updated: 2024-03-25T23:30:14Z day: '27' department: - _id: GeKa doi: 10.48550/arXiv.2107.12975 external_id: arxiv: - '2107.12975' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.48550/arXiv.2107.12975 month: '07' oa: 1 oa_version: Preprint project: - _id: 2641CE5E-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P30207 name: Hole spin orbit qubits in Ge quantum wells publication: arXiv publication_status: submitted related_material: record: - id: '10058' relation: dissertation_contains status: public status: public title: Cross-architecture tuning of silicon and SiGe-based quantum devices using machine learning type: preprint user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2021' ... --- _id: '10123' abstract: - lang: eng text: Solution synthesis of particles emerged as an alternative to prepare thermoelectric materials with less demanding processing conditions than conventional solid-state synthetic methods. However, solution synthesis generally involves the presence of additional molecules or ions belonging to the precursors or added to enable solubility and/or regulate nucleation and growth. These molecules or ions can end up in the particles as surface adsorbates and interfere in the material properties. This work demonstrates that ionic adsorbates, in particular Na⁺ ions, are electrostatically adsorbed in SnSe particles synthesized in water and play a crucial role not only in directing the material nano/microstructure but also in determining the transport properties of the consolidated material. In dense pellets prepared by sintering SnSe particles, Na remains within the crystal lattice as dopant, in dislocations, precipitates, and forming grain boundary complexions. These results highlight the importance of considering all the possible unintentional impurities to establish proper structure-property relationships and control material properties in solution-processed thermoelectric materials. acknowledged_ssus: - _id: EM-Fac - _id: NanoFab acknowledgement: 'Y.L. and M.C. contributed equally to this work. This research was supported by the Scientific Service Units (SSU) of IST Austria through resources provided by Electron Microscopy Facility (EMF) and the Nanofabrication Facility (NNF). This work was financially supported by IST Austria and the Werner Siemens Foundation. Y.L. acknowledges funding from the European Union''s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement No. 754411. M.C. has received funding from the European Union''s Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 665385. Y.Y. and O.C.-M. acknowledge the financial support from DFG within the project SFB 917: Nanoswitches. J.L. is a Serra Húnter Fellow and is grateful to ICREA Academia program. C.C. acknowledges funding from the FWF “Lise Meitner Fellowship” grant agreement M 2889-N.' article_number: '2106858' article_processing_charge: Yes (via OA deal) article_type: original author: - first_name: Yu full_name: Liu, Yu id: 2A70014E-F248-11E8-B48F-1D18A9856A87 last_name: Liu orcid: 0000-0001-7313-6740 - first_name: Mariano full_name: Calcabrini, Mariano id: 45D7531A-F248-11E8-B48F-1D18A9856A87 last_name: Calcabrini orcid: 0000-0003-4566-5877 - first_name: Yuan full_name: Yu, Yuan last_name: Yu - first_name: Aziz full_name: Genç, Aziz last_name: Genç - first_name: Cheng full_name: Chang, Cheng id: 9E331C2E-9F27-11E9-AE48-5033E6697425 last_name: Chang orcid: 0000-0002-9515-4277 - first_name: Tommaso full_name: Costanzo, Tommaso id: D93824F4-D9BA-11E9-BB12-F207E6697425 last_name: Costanzo orcid: 0000-0001-9732-3815 - first_name: Tobias full_name: Kleinhanns, Tobias id: 8BD9DE16-AB3C-11E9-9C8C-2A03E6697425 last_name: Kleinhanns - first_name: Seungho full_name: Lee, Seungho id: BB243B88-D767-11E9-B658-BC13E6697425 last_name: Lee orcid: 0000-0002-6962-8598 - first_name: Jordi full_name: Llorca, Jordi last_name: Llorca - first_name: Oana full_name: Cojocaru‐Mirédin, Oana last_name: Cojocaru‐Mirédin - first_name: Maria full_name: Ibáñez, Maria id: 43C61214-F248-11E8-B48F-1D18A9856A87 last_name: Ibáñez orcid: 0000-0001-5013-2843 citation: ama: 'Liu Y, Calcabrini M, Yu Y, et al. The importance of surface adsorbates in solution‐processed thermoelectric materials: The case of SnSe. Advanced Materials. 2021;33(52). doi:10.1002/adma.202106858' apa: 'Liu, Y., Calcabrini, M., Yu, Y., Genç, A., Chang, C., Costanzo, T., … Ibáñez, M. (2021). The importance of surface adsorbates in solution‐processed thermoelectric materials: The case of SnSe. Advanced Materials. Wiley. https://doi.org/10.1002/adma.202106858' chicago: 'Liu, Yu, Mariano Calcabrini, Yuan Yu, Aziz Genç, Cheng Chang, Tommaso Costanzo, Tobias Kleinhanns, et al. “The Importance of Surface Adsorbates in Solution‐processed Thermoelectric Materials: The Case of SnSe.” Advanced Materials. Wiley, 2021. https://doi.org/10.1002/adma.202106858.' ieee: 'Y. Liu et al., “The importance of surface adsorbates in solution‐processed thermoelectric materials: The case of SnSe,” Advanced Materials, vol. 33, no. 52. Wiley, 2021.' ista: 'Liu Y, Calcabrini M, Yu Y, Genç A, Chang C, Costanzo T, Kleinhanns T, Lee S, Llorca J, Cojocaru‐Mirédin O, Ibáñez M. 2021. The importance of surface adsorbates in solution‐processed thermoelectric materials: The case of SnSe. Advanced Materials. 33(52), 2106858.' mla: 'Liu, Yu, et al. “The Importance of Surface Adsorbates in Solution‐processed Thermoelectric Materials: The Case of SnSe.” Advanced Materials, vol. 33, no. 52, 2106858, Wiley, 2021, doi:10.1002/adma.202106858.' short: Y. Liu, M. Calcabrini, Y. Yu, A. Genç, C. Chang, T. Costanzo, T. Kleinhanns, S. Lee, J. Llorca, O. Cojocaru‐Mirédin, M. Ibáñez, Advanced Materials 33 (2021). date_created: 2021-10-11T20:07:24Z date_published: 2021-12-29T00:00:00Z date_updated: 2023-08-14T07:25:27Z day: '29' ddc: - '620' department: - _id: EM-Fac - _id: MaIb doi: 10.1002/adma.202106858 ec_funded: 1 external_id: isi: - '000709899300001' pmid: - '34626034' file: - access_level: open_access checksum: 990bccc527c64d85cf1c97885110b5f4 content_type: application/pdf creator: cchlebak date_created: 2022-02-03T13:16:14Z date_updated: 2022-02-03T13:16:14Z file_id: '10720' file_name: 2021_AdvancedMaterials_Liu.pdf file_size: 5595666 relation: main_file success: 1 file_date_updated: 2022-02-03T13:16:14Z has_accepted_license: '1' intvolume: ' 33' isi: 1 issue: '52' keyword: - mechanical engineering - mechanics of materials - general materials science language: - iso: eng month: '12' oa: 1 oa_version: Published Version pmid: 1 project: - _id: 2564DBCA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '665385' name: International IST Doctoral Program - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships - _id: 9B8804FC-BA93-11EA-9121-9846C619BF3A grant_number: M02889 name: Bottom-up Engineering for Thermoelectric Applications - _id: 9B8F7476-BA93-11EA-9121-9846C619BF3A name: 'HighTE: The Werner Siemens Laboratory for the High Throughput Discovery of Semiconductors for Waste Heat Recovery' publication: Advanced Materials publication_identifier: eissn: - 1521-4095 issn: - 0935-9648 publication_status: published publisher: Wiley quality_controlled: '1' related_material: record: - id: '12885' relation: dissertation_contains status: public scopus_import: '1' status: public title: 'The importance of surface adsorbates in solution‐processed thermoelectric materials: The case of SnSe' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 33 year: '2021' ... --- _id: '10559' abstract: - lang: eng text: Hole gases in planar germanium can have high mobilities in combination with strong spin-orbit interaction and electrically tunable g factors, and are therefore emerging as a promising platform for creating hybrid superconductor-semiconductor devices. A key challenge towards hybrid Ge-based quantum technologies is the design of high-quality interfaces and superconducting contacts that are robust against magnetic fields. In this work, by combining the assets of aluminum, which provides good contact to the Ge, and niobium, which has a significant superconducting gap, we demonstrate highly transparent low-disordered JoFETs with relatively large ICRN products that are capable of withstanding high magnetic fields. We furthermore demonstrate the ability of phase-biasing individual JoFETs, opening up an avenue to explore topological superconductivity in planar Ge. The persistence of superconductivity in the reported hybrid devices beyond 1.8 T paves the way towards integrating spin qubits and proximity-induced superconductivity on the same chip. acknowledged_ssus: - _id: NanoFab - _id: M-Shop acknowledgement: This research and related results were made possible with the support of the NOMIS Foundation. This research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA Machine Shop and the nanofabrication facility, the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant agreement No. 844511 Grant Agreement No. 862046. ICN2 acknowledge funding from Generalitat de Catalunya 2017 SGR 327. ICN2 is supported by the Severo Ochoa program from Spanish MINECO (Grant No. SEV-2017-0706) and is funded by the CERCA Programme/Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Autnoma de Barcelona Materials Science PhD program. The HAADF-STEM microscopy was conducted in the Laboratorio de Microscopias Avanzadas at Instituto de Nanociencia de Aragon-Universidad de Zaragoza. Authors acknowledge the LMA-INA for offering access to their instruments and expertise. We acknowledge support from CSIC Research Platform on Quantum Technologies PTI-001. This project has received funding from the European Union's Horizon 2020 research and innovation programme under Grant Agreement No. 823717 ESTEEM3. M.B. acknowledges support from SUR Generalitat de Catalunya and the EU Social Fund; project ref. 2020 FI 00103. G.S. and M.V. acknowledge support through a projectruimte grant associated with the Netherlands Organization of Scientific Research (NWO). J.D. acknowledges support through FRIPRO-project 274853, which is funded by the Research Council of Norway. article_number: L022005 article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Kushagra full_name: Aggarwal, Kushagra id: b22ab905-3539-11eb-84c3-fc159dcd79cb last_name: Aggarwal orcid: 0000-0001-9985-9293 - first_name: Andrea C full_name: Hofmann, Andrea C id: 340F461A-F248-11E8-B48F-1D18A9856A87 last_name: Hofmann - first_name: Daniel full_name: Jirovec, Daniel id: 4C473F58-F248-11E8-B48F-1D18A9856A87 last_name: Jirovec orcid: 0000-0002-7197-4801 - first_name: Ivan full_name: Prieto Gonzalez, Ivan id: 2A307FE2-F248-11E8-B48F-1D18A9856A87 last_name: Prieto Gonzalez orcid: 0000-0002-7370-5357 - first_name: Amir full_name: Sammak, Amir last_name: Sammak - first_name: Marc full_name: Botifoll, Marc last_name: Botifoll - first_name: Sara full_name: Martí-Sánchez, Sara last_name: Martí-Sánchez - first_name: Menno full_name: Veldhorst, Menno last_name: Veldhorst - first_name: Jordi full_name: Arbiol, Jordi last_name: Arbiol - first_name: Giordano full_name: Scappucci, Giordano last_name: Scappucci - first_name: Jeroen full_name: Danon, Jeroen last_name: Danon - first_name: Georgios full_name: Katsaros, Georgios id: 38DB5788-F248-11E8-B48F-1D18A9856A87 last_name: Katsaros orcid: 0000-0001-8342-202X citation: ama: Aggarwal K, Hofmann AC, Jirovec D, et al. Enhancement of proximity-induced superconductivity in a planar Ge hole gas. Physical Review Research. 2021;3(2). doi:10.1103/physrevresearch.3.l022005 apa: Aggarwal, K., Hofmann, A. C., Jirovec, D., Prieto Gonzalez, I., Sammak, A., Botifoll, M., … Katsaros, G. (2021). Enhancement of proximity-induced superconductivity in a planar Ge hole gas. Physical Review Research. American Physical Society. https://doi.org/10.1103/physrevresearch.3.l022005 chicago: Aggarwal, Kushagra, Andrea C Hofmann, Daniel Jirovec, Ivan Prieto Gonzalez, Amir Sammak, Marc Botifoll, Sara Martí-Sánchez, et al. “Enhancement of Proximity-Induced Superconductivity in a Planar Ge Hole Gas.” Physical Review Research. American Physical Society, 2021. https://doi.org/10.1103/physrevresearch.3.l022005. ieee: K. Aggarwal et al., “Enhancement of proximity-induced superconductivity in a planar Ge hole gas,” Physical Review Research, vol. 3, no. 2. American Physical Society, 2021. ista: Aggarwal K, Hofmann AC, Jirovec D, Prieto Gonzalez I, Sammak A, Botifoll M, Martí-Sánchez S, Veldhorst M, Arbiol J, Scappucci G, Danon J, Katsaros G. 2021. Enhancement of proximity-induced superconductivity in a planar Ge hole gas. Physical Review Research. 3(2), L022005. mla: Aggarwal, Kushagra, et al. “Enhancement of Proximity-Induced Superconductivity in a Planar Ge Hole Gas.” Physical Review Research, vol. 3, no. 2, L022005, American Physical Society, 2021, doi:10.1103/physrevresearch.3.l022005. short: K. Aggarwal, A.C. Hofmann, D. Jirovec, I. Prieto Gonzalez, A. Sammak, M. Botifoll, S. Martí-Sánchez, M. Veldhorst, J. Arbiol, G. Scappucci, J. Danon, G. Katsaros, Physical Review Research 3 (2021). date_created: 2021-12-16T18:50:57Z date_published: 2021-04-15T00:00:00Z date_updated: 2024-02-21T12:41:26Z day: '15' ddc: - '620' department: - _id: GeKa doi: 10.1103/physrevresearch.3.l022005 ec_funded: 1 external_id: arxiv: - '2012.00322' file: - access_level: open_access checksum: 60a1bc9c9b616b1b155044bb8cfc6484 content_type: application/pdf creator: cchlebak date_created: 2021-12-17T08:12:37Z date_updated: 2021-12-17T08:12:37Z file_id: '10561' file_name: 2021_PhysRevResearch_Aggarwal.pdf file_size: 1917512 relation: main_file success: 1 file_date_updated: 2021-12-17T08:12:37Z has_accepted_license: '1' intvolume: ' 3' issue: '2' keyword: - general engineering language: - iso: eng month: '04' oa: 1 oa_version: Published Version project: - _id: 26A151DA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '844511' name: Majorana bound states in Ge/SiGe heterostructures - _id: 237E5020-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '862046' name: TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: record: - id: '8831' relation: earlier_version status: public - id: '8834' relation: research_data status: public scopus_import: '1' status: public title: Enhancement of proximity-induced superconductivity in a planar Ge hole gas tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9 volume: 3 year: '2021' ... --- _id: '10606' abstract: - lang: eng text: Cell division orientation is thought to result from a competition between cell geometry and polarity domains controlling the position of the mitotic spindle during mitosis. Depending on the level of cell shape anisotropy or the strength of the polarity domain, one dominates the other and determines the orientation of the spindle. Whether and how such competition is also at work to determine unequal cell division (UCD), producing daughter cells of different size, remains unclear. Here, we show that cell geometry and polarity domains cooperate, rather than compete, in positioning the cleavage plane during UCDs in early ascidian embryos. We found that the UCDs and their orientation at the ascidian third cleavage rely on the spindle tilting in an anisotropic cell shape, and cortical polarity domains exerting different effects on spindle astral microtubules. By systematically varying mitotic cell shape, we could modulate the effect of attractive and repulsive polarity domains and consequently generate predicted daughter cell size asymmetries and position. We therefore propose that the spindle position during UCD is set by the combined activities of cell geometry and polarity domains, where cell geometry modulates the effect of cortical polarity domain(s). acknowledged_ssus: - _id: NanoFab - _id: Bio acknowledgement: 'We thank members of the Heisenberg and McDougall groups for technical advice and discussion. We are grateful to the Bioimaging and Nanofabrication facilities of IST Austria and the Imaging Platform (PIM) and animal facility (CRB) of Institut de la Mer de Villefranche (IMEV), which is supported by EMBRC-France, whose French state funds are managed by the ANR within the Investments of the Future program under reference ANR-10-INBS-0, for continuous support. This work was supported by a collaborative grant from the French Government funding agency Agence National de la Recherche to McDougall (ANR ''MorCell'': ANR-17-CE 13-0028) and the Austrian Science Fund to Heisenberg (FWF: I 3601-B27).' article_number: e75639 article_processing_charge: No article_type: original author: - first_name: Benoit G full_name: Godard, Benoit G id: 33280250-F248-11E8-B48F-1D18A9856A87 last_name: Godard - first_name: Remi full_name: Dumollard, Remi last_name: Dumollard - first_name: Carl-Philipp J full_name: Heisenberg, Carl-Philipp J id: 39427864-F248-11E8-B48F-1D18A9856A87 last_name: Heisenberg orcid: 0000-0002-0912-4566 - first_name: Alex full_name: Mcdougall, Alex last_name: Mcdougall citation: ama: Godard BG, Dumollard R, Heisenberg C-PJ, Mcdougall A. Combined effect of cell geometry and polarity domains determines the orientation of unequal division. eLife. 2021;10. doi:10.7554/eLife.75639 apa: Godard, B. G., Dumollard, R., Heisenberg, C.-P. J., & Mcdougall, A. (2021). Combined effect of cell geometry and polarity domains determines the orientation of unequal division. ELife. eLife Sciences Publications. https://doi.org/10.7554/eLife.75639 chicago: Godard, Benoit G, Remi Dumollard, Carl-Philipp J Heisenberg, and Alex Mcdougall. “Combined Effect of Cell Geometry and Polarity Domains Determines the Orientation of Unequal Division.” ELife. eLife Sciences Publications, 2021. https://doi.org/10.7554/eLife.75639. ieee: B. G. Godard, R. Dumollard, C.-P. J. Heisenberg, and A. Mcdougall, “Combined effect of cell geometry and polarity domains determines the orientation of unequal division,” eLife, vol. 10. eLife Sciences Publications, 2021. ista: Godard BG, Dumollard R, Heisenberg C-PJ, Mcdougall A. 2021. Combined effect of cell geometry and polarity domains determines the orientation of unequal division. eLife. 10, e75639. mla: Godard, Benoit G., et al. “Combined Effect of Cell Geometry and Polarity Domains Determines the Orientation of Unequal Division.” ELife, vol. 10, e75639, eLife Sciences Publications, 2021, doi:10.7554/eLife.75639. short: B.G. Godard, R. Dumollard, C.-P.J. Heisenberg, A. Mcdougall, ELife 10 (2021). date_created: 2022-01-09T23:01:26Z date_published: 2021-12-21T00:00:00Z date_updated: 2023-08-17T06:32:44Z day: '21' ddc: - '570' department: - _id: CaHe doi: 10.7554/eLife.75639 external_id: isi: - '000733610100001' file: - access_level: open_access checksum: 759c7a873d554c48a6639e6350746ca6 content_type: application/pdf creator: alisjak date_created: 2022-01-10T09:40:37Z date_updated: 2022-01-10T09:40:37Z file_id: '10611' file_name: 2021_eLife_Godard.pdf file_size: 7769934 relation: main_file success: 1 file_date_updated: 2022-01-10T09:40:37Z has_accepted_license: '1' intvolume: ' 10' isi: 1 language: - iso: eng month: '12' oa: 1 oa_version: Published Version project: - _id: 2646861A-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: I03601 name: Control of embryonic cleavage pattern publication: eLife publication_identifier: eissn: - 2050-084X publication_status: published publisher: eLife Sciences Publications quality_controlled: '1' scopus_import: '1' status: public title: Combined effect of cell geometry and polarity domains determines the orientation of unequal division tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 10 year: '2021' ... --- _id: '9920' abstract: - lang: eng text: 'This work is concerned with two fascinating circuit quantum electrodynamics components, the Josephson junction and the geometric superinductor, and the interesting experiments that can be done by combining the two. The Josephson junction has revolutionized the field of superconducting circuits as a non-linear dissipation-less circuit element and is used in almost all superconducting qubit implementations since the 90s. On the other hand, the superinductor is a relatively new circuit element introduced as a key component of the fluxonium qubit in 2009. This is an inductor with characteristic impedance larger than the resistance quantum and self-resonance frequency in the GHz regime. The combination of these two elements can occur in two fundamental ways: in parallel and in series. When connected in parallel the two create the fluxonium qubit, a loop with large inductance and a rich energy spectrum reliant on quantum tunneling. On the other hand placing the two elements in series aids with the measurement of the IV curve of a single Josephson junction in a high impedance environment. In this limit theory predicts that the junction will behave as its dual element: the phase-slip junction. While the Josephson junction acts as a non-linear inductor the phase-slip junction has the behavior of a non-linear capacitance and can be used to measure new Josephson junction phenomena, namely Coulomb blockade of Cooper pairs and phase-locked Bloch oscillations. The latter experiment allows for a direct link between frequency and current which is an elusive connection in quantum metrology. This work introduces the geometric superinductor, a superconducting circuit element where the high inductance is due to the geometry rather than the material properties of the superconductor, realized from a highly miniaturized superconducting planar coil. These structures will be described and characterized as resonators and qubit inductors and progress towards the measurement of phase-locked Bloch oscillations will be presented.' acknowledged_ssus: - _id: NanoFab - _id: M-Shop alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Matilda full_name: Peruzzo, Matilda id: 3F920B30-F248-11E8-B48F-1D18A9856A87 last_name: Peruzzo orcid: 0000-0002-3415-4628 citation: ama: Peruzzo M. Geometric superinductors and their applications in circuit quantum electrodynamics. 2021. doi:10.15479/at:ista:9920 apa: Peruzzo, M. (2021). Geometric superinductors and their applications in circuit quantum electrodynamics. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:9920 chicago: Peruzzo, Matilda. “Geometric Superinductors and Their Applications in Circuit Quantum Electrodynamics.” Institute of Science and Technology Austria, 2021. https://doi.org/10.15479/at:ista:9920. ieee: M. Peruzzo, “Geometric superinductors and their applications in circuit quantum electrodynamics,” Institute of Science and Technology Austria, 2021. ista: Peruzzo M. 2021. Geometric superinductors and their applications in circuit quantum electrodynamics. Institute of Science and Technology Austria. mla: Peruzzo, Matilda. Geometric Superinductors and Their Applications in Circuit Quantum Electrodynamics. Institute of Science and Technology Austria, 2021, doi:10.15479/at:ista:9920. short: M. Peruzzo, Geometric Superinductors and Their Applications in Circuit Quantum Electrodynamics, Institute of Science and Technology Austria, 2021. date_created: 2021-08-16T09:44:09Z date_published: 2021-08-19T00:00:00Z date_updated: 2024-09-10T12:23:56Z day: '19' ddc: - '539' degree_awarded: PhD department: - _id: GradSch - _id: JoFi doi: 10.15479/at:ista:9920 file: - access_level: closed checksum: 3cd1986efde5121d7581f6fcf9090da8 content_type: application/x-zip-compressed creator: mperuzzo date_created: 2021-08-16T09:33:21Z date_updated: 2021-09-06T08:39:47Z file_id: '9924' file_name: GeometricSuperinductorsForCQED.zip file_size: 151387283 relation: source_file - access_level: open_access checksum: 50928c621cdf0775d7a5906b9dc8602c content_type: application/pdf creator: mperuzzo date_created: 2021-08-18T14:20:06Z date_updated: 2021-09-06T08:39:47Z file_id: '9939' file_name: GeometricSuperinductorsAndTheirApplicationsIncQED-1b.pdf file_size: 17596344 relation: main_file - access_level: closed checksum: 37f486aa1b622fe44af00d627ec13f6c content_type: application/pdf creator: mperuzzo date_created: 2021-08-18T14:20:09Z date_updated: 2021-09-06T08:39:47Z description: Extra copy of the thesis as PDF/A-2b file_id: '9940' file_name: GeometricSuperinductorsAndTheirApplicationsIncQED-2b.pdf file_size: 17592425 relation: other file_date_updated: 2021-09-06T08:39:47Z has_accepted_license: '1' keyword: - quantum computing - superinductor - quantum metrology language: - iso: eng month: '08' oa: 1 oa_version: Published Version page: '149' publication_identifier: isbn: - 978-3-99078-013-8 issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '9928' relation: part_of_dissertation status: public - id: '8755' relation: part_of_dissertation status: public status: public supervisor: - first_name: Johannes M full_name: Fink, Johannes M id: 4B591CBA-F248-11E8-B48F-1D18A9856A87 last_name: Fink orcid: 0000-0001-8112-028X title: Geometric superinductors and their applications in circuit quantum electrodynamics type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2021' ... --- _id: '9928' abstract: - lang: eng text: There are two elementary superconducting qubit types that derive directly from the quantum harmonic oscillator. In one, the inductor is replaced by a nonlinear Josephson junction to realize the widely used charge qubits with a compact phase variable and a discrete charge wave function. In the other, the junction is added in parallel, which gives rise to an extended phase variable, continuous wave functions, and a rich energy-level structure due to the loop topology. While the corresponding rf superconducting quantum interference device Hamiltonian was introduced as a quadratic quasi-one-dimensional potential approximation to describe the fluxonium qubit implemented with long Josephson-junction arrays, in this work we implement it directly using a linear superinductor formed by a single uninterrupted aluminum wire. We present a large variety of qubits, all stemming from the same circuit but with drastically different characteristic energy scales. This includes flux and fluxonium qubits but also the recently introduced quasicharge qubit with strongly enhanced zero-point phase fluctuations and a heavily suppressed flux dispersion. The use of a geometric inductor results in high reproducibility of the inductive energy as guaranteed by top-down lithography—a key ingredient for intrinsically protected superconducting qubits. acknowledged_ssus: - _id: NanoFab - _id: M-Shop acknowledgement: We thank W. Hughes for analytic and numerical modeling during the early stages of this work, J. Koch for discussions and support with the scqubits package, R. Sett, P. Zielinski, and L. Drmic for software development, and G. Katsaros for equipment support, as well as the MIBA workshop and the Institute of Science and Technology Austria nanofabrication facility. We thank I. Pop, S. Deleglise, and E. Flurin for discussions. This work was supported by a NOMIS Foundation research grant, the Austrian Science Fund (FWF) through BeyondC (F7105), and IST Austria. M.P. is the recipient of a Pöttinger scholarship at IST Austria. E.R. is the recipient of a DOC fellowship of the Austrian Academy of Sciences at IST Austria. article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Matilda full_name: Peruzzo, Matilda id: 3F920B30-F248-11E8-B48F-1D18A9856A87 last_name: Peruzzo orcid: 0000-0002-3415-4628 - first_name: Farid full_name: Hassani, Farid id: 2AED110C-F248-11E8-B48F-1D18A9856A87 last_name: Hassani orcid: 0000-0001-6937-5773 - first_name: Gregory full_name: Szep, Gregory last_name: Szep - first_name: Andrea full_name: Trioni, Andrea id: 42F71B44-F248-11E8-B48F-1D18A9856A87 last_name: Trioni - first_name: Elena full_name: Redchenko, Elena id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87 last_name: Redchenko - first_name: Martin full_name: Zemlicka, Martin id: 2DCF8DE6-F248-11E8-B48F-1D18A9856A87 last_name: Zemlicka - first_name: Johannes M full_name: Fink, Johannes M id: 4B591CBA-F248-11E8-B48F-1D18A9856A87 last_name: Fink orcid: 0000-0001-8112-028X citation: ama: 'Peruzzo M, Hassani F, Szep G, et al. Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction. PRX Quantum. 2021;2(4):040341. doi:10.1103/PRXQuantum.2.040341' apa: 'Peruzzo, M., Hassani, F., Szep, G., Trioni, A., Redchenko, E., Zemlicka, M., & Fink, J. M. (2021). Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction. PRX Quantum. American Physical Society. https://doi.org/10.1103/PRXQuantum.2.040341' chicago: 'Peruzzo, Matilda, Farid Hassani, Gregory Szep, Andrea Trioni, Elena Redchenko, Martin Zemlicka, and Johannes M Fink. “Geometric Superinductance Qubits: Controlling Phase Delocalization across a Single Josephson Junction.” PRX Quantum. American Physical Society, 2021. https://doi.org/10.1103/PRXQuantum.2.040341.' ieee: 'M. Peruzzo et al., “Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction,” PRX Quantum, vol. 2, no. 4. American Physical Society, p. 040341, 2021.' ista: 'Peruzzo M, Hassani F, Szep G, Trioni A, Redchenko E, Zemlicka M, Fink JM. 2021. Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction. PRX Quantum. 2(4), 040341.' mla: 'Peruzzo, Matilda, et al. “Geometric Superinductance Qubits: Controlling Phase Delocalization across a Single Josephson Junction.” PRX Quantum, vol. 2, no. 4, American Physical Society, 2021, p. 040341, doi:10.1103/PRXQuantum.2.040341.' short: M. Peruzzo, F. Hassani, G. Szep, A. Trioni, E. Redchenko, M. Zemlicka, J.M. Fink, PRX Quantum 2 (2021) 040341. date_created: 2021-08-17T08:14:18Z date_published: 2021-11-24T00:00:00Z date_updated: 2023-09-07T13:31:22Z day: '24' ddc: - '530' department: - _id: JoFi - _id: NanoFab - _id: M-Shop doi: 10.1103/PRXQuantum.2.040341 ec_funded: 1 external_id: arxiv: - '2106.05882' isi: - '000723015100001' file: - access_level: open_access checksum: 36eb41ea43d8ca22b0efab12419e4eb2 content_type: application/pdf creator: cchlebak date_created: 2022-01-18T11:29:33Z date_updated: 2022-01-18T11:29:33Z file_id: '10641' file_name: 2021_PRXQuantum_Peruzzo.pdf file_size: 4247422 relation: main_file success: 1 file_date_updated: 2022-01-18T11:29:33Z has_accepted_license: '1' intvolume: ' 2' isi: 1 issue: '4' keyword: - quantum physics - mesoscale and nanoscale physics language: - iso: eng month: '11' oa: 1 oa_version: Published Version page: '040341' project: - _id: 26927A52-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: F07105 name: Integrating superconducting quantum circuits - _id: 2564DBCA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '665385' name: International IST Doctoral Program - _id: 2622978C-B435-11E9-9278-68D0E5697425 name: Hybrid Semiconductor - Superconductor Quantum Devices publication: PRX Quantum publication_identifier: eissn: - 2691-3399 publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: record: - id: '13057' relation: research_data status: public - id: '9920' relation: dissertation_contains status: public scopus_import: '1' status: public title: 'Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction' tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 2 year: '2021' ... --- _id: '8203' abstract: - lang: eng text: Using inelastic cotunneling spectroscopy we observe a zero field splitting within the spin triplet manifold of Ge hut wire quantum dots. The states with spin ±1 in the confinement direction are energetically favored by up to 55 μeV compared to the spin 0 triplet state because of the strong spin–orbit coupling. The reported effect should be observable in a broad class of strongly confined hole quantum-dot systems and might need to be considered when operating hole spin qubits. acknowledged_ssus: - _id: NanoFab - _id: M-Shop acknowledgement: "We acknowledge G. Burkard, V. N. Golovach, C. Kloeffel, D.Loss, P. Rabl, and M. Rancič ́ for helpful discussions. We\r\nfurther acknowledge T. Adletzberger, J. Aguilera, T. Asenov, S. Bagiante, T. Menner, L. Shafeek, P. Taus, P. Traunmüller, and D. Waldhausl for their invaluable assistance. This research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA Machine Shop and the nanofabrication facility, by the FWF-P 32235 project, by the National Key R&D Program of China (2016YFA0301701, 2016YFA0300600), and by the European Union’s Horizon 2020 research and innovation program under grant agreement no. 862046. All data of this publication are available at 10.15479/AT:ISTA:7689." article_processing_charge: Yes (via OA deal) article_type: original author: - first_name: Georgios full_name: Katsaros, Georgios id: 38DB5788-F248-11E8-B48F-1D18A9856A87 last_name: Katsaros orcid: 0000-0001-8342-202X - first_name: Josip full_name: Kukucka, Josip id: 3F5D8856-F248-11E8-B48F-1D18A9856A87 last_name: Kukucka - first_name: Lada full_name: Vukušić, Lada id: 31E9F056-F248-11E8-B48F-1D18A9856A87 last_name: Vukušić orcid: 0000-0003-2424-8636 - first_name: Hannes full_name: Watzinger, Hannes id: 35DF8E50-F248-11E8-B48F-1D18A9856A87 last_name: Watzinger - first_name: Fei full_name: Gao, Fei last_name: Gao - first_name: Ting full_name: Wang, Ting last_name: Wang orcid: 0000-0002-4619-9575 - first_name: Jian-Jun full_name: Zhang, Jian-Jun last_name: Zhang - first_name: Karsten full_name: Held, Karsten last_name: Held citation: ama: Katsaros G, Kukucka J, Vukušić L, et al. Zero field splitting of heavy-hole states in quantum dots. Nano Letters. 2020;20(7):5201-5206. doi:10.1021/acs.nanolett.0c01466 apa: Katsaros, G., Kukucka, J., Vukušić, L., Watzinger, H., Gao, F., Wang, T., … Held, K. (2020). Zero field splitting of heavy-hole states in quantum dots. Nano Letters. American Chemical Society. https://doi.org/10.1021/acs.nanolett.0c01466 chicago: Katsaros, Georgios, Josip Kukucka, Lada Vukušić, Hannes Watzinger, Fei Gao, Ting Wang, Jian-Jun Zhang, and Karsten Held. “Zero Field Splitting of Heavy-Hole States in Quantum Dots.” Nano Letters. American Chemical Society, 2020. https://doi.org/10.1021/acs.nanolett.0c01466. ieee: G. Katsaros et al., “Zero field splitting of heavy-hole states in quantum dots,” Nano Letters, vol. 20, no. 7. American Chemical Society, pp. 5201–5206, 2020. ista: Katsaros G, Kukucka J, Vukušić L, Watzinger H, Gao F, Wang T, Zhang J-J, Held K. 2020. Zero field splitting of heavy-hole states in quantum dots. Nano Letters. 20(7), 5201–5206. mla: Katsaros, Georgios, et al. “Zero Field Splitting of Heavy-Hole States in Quantum Dots.” Nano Letters, vol. 20, no. 7, American Chemical Society, 2020, pp. 5201–06, doi:10.1021/acs.nanolett.0c01466. short: G. Katsaros, J. Kukucka, L. Vukušić, H. Watzinger, F. Gao, T. Wang, J.-J. Zhang, K. Held, Nano Letters 20 (2020) 5201–5206. date_created: 2020-08-06T09:25:04Z date_published: 2020-06-01T00:00:00Z date_updated: 2024-02-21T12:44:01Z day: '01' ddc: - '530' department: - _id: GeKa doi: 10.1021/acs.nanolett.0c01466 ec_funded: 1 external_id: isi: - '000548893200066' pmid: - '32479090' file: - access_level: open_access content_type: application/pdf creator: dernst date_created: 2020-08-06T09:35:37Z date_updated: 2020-08-06T09:35:37Z file_id: '8204' file_name: 2020_NanoLetters_Katsaros.pdf file_size: 3308906 relation: main_file success: 1 file_date_updated: 2020-08-06T09:35:37Z has_accepted_license: '1' intvolume: ' 20' isi: 1 issue: '7' language: - iso: eng month: '06' oa: 1 oa_version: Published Version page: 5201-5206 pmid: 1 project: - _id: 237B3DA4-32DE-11EA-91FC-C7463DDC885E call_identifier: FWF grant_number: P32235 name: Towards scalable hut wire quantum devices - _id: 237E5020-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '862046' name: TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS publication: Nano Letters publication_identifier: eissn: - 1530-6992 issn: - 1530-6984 publication_status: published publisher: American Chemical Society quality_controlled: '1' related_material: record: - id: '7689' relation: research_data status: public scopus_import: '1' status: public title: Zero field splitting of heavy-hole states in quantum dots tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 20 year: '2020' ... --- _id: '8341' abstract: - lang: eng text: "One of the most striking hallmarks of the eukaryotic cell is the presence of intracellular vesicles and organelles. Each of these membrane-enclosed compartments has a distinct composition of lipids and proteins, which is essential for accurate membrane traffic and homeostasis. Interestingly, their biochemical identities are achieved with the help\r\nof small GTPases of the Rab family, which cycle between GDP- and GTP-bound forms on the selected membrane surface. While this activity switch is well understood for an individual protein, how Rab GTPases collectively transition between states to generate decisive signal propagation in space and time is unclear. In my PhD thesis, I present\r\nin vitro reconstitution experiments with theoretical modeling to systematically study a minimal Rab5 activation network from bottom-up. We find that positive feedback based on known molecular interactions gives rise to bistable GTPase activity switching on system’s scale. Furthermore, we determine that collective transition near the critical\r\npoint is intrinsically stochastic and provide evidence that the inactive Rab5 abundance on the membrane can shape the network response. Finally, we demonstrate that collective switching can spread on the lipid bilayer as a traveling activation wave, representing a possible emergent activity pattern in endosomal maturation. Together, our\r\nfindings reveal new insights into the self-organization properties of signaling networks away from chemical equilibrium. Our work highlights the importance of systematic characterization of biochemical systems in well-defined physiological conditions. This way, we were able to answer long-standing open questions in the field and close the gap between regulatory processes on a molecular scale and emergent responses on system’s level." acknowledged_ssus: - _id: Bio - _id: LifeSc - _id: NanoFab acknowledgement: My thanks goes to the Loose lab members, BioImaging, Life Science and Nanofabrication Facilities and the wonderful international community at IST for sharing this experience with me. alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Urban full_name: Bezeljak, Urban id: 2A58201A-F248-11E8-B48F-1D18A9856A87 last_name: Bezeljak orcid: 0000-0003-1365-5631 citation: ama: Bezeljak U. In vitro reconstitution of a Rab activation switch. 2020. doi:10.15479/AT:ISTA:8341 apa: Bezeljak, U. (2020). In vitro reconstitution of a Rab activation switch. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:8341 chicago: Bezeljak, Urban. “In Vitro Reconstitution of a Rab Activation Switch.” Institute of Science and Technology Austria, 2020. https://doi.org/10.15479/AT:ISTA:8341. ieee: U. Bezeljak, “In vitro reconstitution of a Rab activation switch,” Institute of Science and Technology Austria, 2020. ista: Bezeljak U. 2020. In vitro reconstitution of a Rab activation switch. Institute of Science and Technology Austria. mla: Bezeljak, Urban. In Vitro Reconstitution of a Rab Activation Switch. Institute of Science and Technology Austria, 2020, doi:10.15479/AT:ISTA:8341. short: U. Bezeljak, In Vitro Reconstitution of a Rab Activation Switch, Institute of Science and Technology Austria, 2020. date_created: 2020-09-08T08:53:53Z date_published: 2020-09-08T00:00:00Z date_updated: 2023-09-07T13:17:06Z day: '08' ddc: - '570' degree_awarded: PhD department: - _id: MaLo doi: 10.15479/AT:ISTA:8341 file: - access_level: closed checksum: 70871b335a595252a66c6bbf0824fb02 content_type: application/x-zip-compressed creator: dernst date_created: 2020-09-08T09:00:29Z date_updated: 2021-09-16T12:49:12Z file_id: '8342' file_name: 2020_Urban_Bezeljak_Thesis_TeX.zip file_size: 65246782 relation: source_file - access_level: open_access checksum: 59a62275088b00b7241e6ff4136434c7 content_type: application/pdf creator: dernst date_created: 2020-09-08T09:00:27Z date_updated: 2021-09-16T12:49:12Z file_id: '8343' file_name: 2020_Urban_Bezeljak_Thesis.pdf file_size: 31259058 relation: main_file file_date_updated: 2021-09-16T12:49:12Z has_accepted_license: '1' language: - iso: eng license: https://creativecommons.org/licenses/by-nc-sa/4.0/ month: '09' oa: 1 oa_version: Published Version page: '215' publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '7580' relation: part_of_dissertation status: public status: public supervisor: - first_name: Martin full_name: Loose, Martin id: 462D4284-F248-11E8-B48F-1D18A9856A87 last_name: Loose orcid: 0000-0001-7309-9724 title: In vitro reconstitution of a Rab activation switch tmp: image: /images/cc_by_nc_sa.png legal_code_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode name: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) short: CC BY-NC-SA (4.0) type: dissertation user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 year: '2020' ... --- _id: '8529' abstract: - lang: eng text: Practical quantum networks require low-loss and noise-resilient optical interconnects as well as non-Gaussian resources for entanglement distillation and distributed quantum computation. The latter could be provided by superconducting circuits but existing solutions to interface the microwave and optical domains lack either scalability or efficiency, and in most cases the conversion noise is not known. In this work we utilize the unique opportunities of silicon photonics, cavity optomechanics and superconducting circuits to demonstrate a fully integrated, coherent transducer interfacing the microwave X and the telecom S bands with a total (internal) bidirectional transduction efficiency of 1.2% (135%) at millikelvin temperatures. The coupling relies solely on the radiation pressure interaction mediated by the femtometer-scale motion of two silicon nanobeams reaching a Vπ as low as 16 μV for sub-nanowatt pump powers. Without the associated optomechanical gain, we achieve a total (internal) pure conversion efficiency of up to 0.019% (1.6%), relevant for future noise-free operation on this qubit-compatible platform. acknowledged_ssus: - _id: NanoFab acknowledgement: We thank Yuan Chen for performing supplementary FEM simulations and Andrew Higginbotham, Ralf Riedinger, Sungkun Hong, and Lorenzo Magrini for valuable discussions. This work was supported by IST Austria, the IST nanofabrication facility (NFF), the European Union’s Horizon 2020 research and innovation program under grant agreement no. 732894 (FET Proactive HOT) and the European Research Council under grant agreement no. 758053 (ERC StG QUNNECT). G.A. is the recipient of a DOC fellowship of the Austrian Academy of Sciences at IST Austria. W.H. is the recipient of an ISTplus postdoctoral fellowship with funding from the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement no. 754411. J.M.F. acknowledges support from the Austrian Science Fund (FWF) through BeyondC (F71), a NOMIS foundation research grant, and the EU’s Horizon 2020 research and innovation program under grant agreement no. 862644 (FET Open QUARTET). article_number: '4460' article_processing_charge: No article_type: original author: - first_name: Georg M full_name: Arnold, Georg M id: 3770C838-F248-11E8-B48F-1D18A9856A87 last_name: Arnold orcid: 0000-0003-1397-7876 - first_name: Matthias full_name: Wulf, Matthias id: 45598606-F248-11E8-B48F-1D18A9856A87 last_name: Wulf orcid: 0000-0001-6613-1378 - first_name: Shabir full_name: Barzanjeh, Shabir id: 2D25E1F6-F248-11E8-B48F-1D18A9856A87 last_name: Barzanjeh orcid: 0000-0003-0415-1423 - first_name: Elena full_name: Redchenko, Elena id: 2C21D6E8-F248-11E8-B48F-1D18A9856A87 last_name: Redchenko - first_name: Alfredo R full_name: Rueda Sanchez, Alfredo R id: 3B82B0F8-F248-11E8-B48F-1D18A9856A87 last_name: Rueda Sanchez orcid: 0000-0001-6249-5860 - first_name: William J full_name: Hease, William J id: 29705398-F248-11E8-B48F-1D18A9856A87 last_name: Hease orcid: 0000-0001-9868-2166 - first_name: Farid full_name: Hassani, Farid id: 2AED110C-F248-11E8-B48F-1D18A9856A87 last_name: Hassani orcid: 0000-0001-6937-5773 - first_name: Johannes M full_name: Fink, Johannes M id: 4B591CBA-F248-11E8-B48F-1D18A9856A87 last_name: Fink orcid: 0000-0001-8112-028X citation: ama: Arnold GM, Wulf M, Barzanjeh S, et al. Converting microwave and telecom photons with a silicon photonic nanomechanical interface. Nature Communications. 2020;11. doi:10.1038/s41467-020-18269-z apa: Arnold, G. M., Wulf, M., Barzanjeh, S., Redchenko, E., Rueda Sanchez, A. R., Hease, W. J., … Fink, J. M. (2020). Converting microwave and telecom photons with a silicon photonic nanomechanical interface. Nature Communications. Springer Nature. https://doi.org/10.1038/s41467-020-18269-z chicago: Arnold, Georg M, Matthias Wulf, Shabir Barzanjeh, Elena Redchenko, Alfredo R Rueda Sanchez, William J Hease, Farid Hassani, and Johannes M Fink. “Converting Microwave and Telecom Photons with a Silicon Photonic Nanomechanical Interface.” Nature Communications. Springer Nature, 2020. https://doi.org/10.1038/s41467-020-18269-z. ieee: G. M. Arnold et al., “Converting microwave and telecom photons with a silicon photonic nanomechanical interface,” Nature Communications, vol. 11. Springer Nature, 2020. ista: Arnold GM, Wulf M, Barzanjeh S, Redchenko E, Rueda Sanchez AR, Hease WJ, Hassani F, Fink JM. 2020. Converting microwave and telecom photons with a silicon photonic nanomechanical interface. Nature Communications. 11, 4460. mla: Arnold, Georg M., et al. “Converting Microwave and Telecom Photons with a Silicon Photonic Nanomechanical Interface.” Nature Communications, vol. 11, 4460, Springer Nature, 2020, doi:10.1038/s41467-020-18269-z. short: G.M. Arnold, M. Wulf, S. Barzanjeh, E. Redchenko, A.R. Rueda Sanchez, W.J. Hease, F. Hassani, J.M. Fink, Nature Communications 11 (2020). date_created: 2020-09-18T10:56:20Z date_published: 2020-09-08T00:00:00Z date_updated: 2024-08-07T07:11:51Z day: '08' ddc: - '530' department: - _id: JoFi doi: 10.1038/s41467-020-18269-z ec_funded: 1 external_id: isi: - '000577280200001' file: - access_level: open_access checksum: 88f92544889eb18bb38e25629a422a86 content_type: application/pdf creator: dernst date_created: 2020-09-18T13:02:37Z date_updated: 2020-09-18T13:02:37Z file_id: '8530' file_name: 2020_NatureComm_Arnold.pdf file_size: 1002818 relation: main_file success: 1 file_date_updated: 2020-09-18T13:02:37Z has_accepted_license: '1' intvolume: ' 11' isi: 1 keyword: - General Biochemistry - Genetics and Molecular Biology - General Physics and Astronomy - General Chemistry language: - iso: eng month: '09' oa: 1 oa_version: Published Version project: - _id: 257EB838-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '732894' name: Hybrid Optomechanical Technologies - _id: 26336814-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '758053' name: A Fiber Optic Transceiver for Superconducting Qubits - _id: 260C2330-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '754411' name: ISTplus - Postdoctoral Fellowships - _id: 237CBA6C-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '862644' name: Quantum readout techniques and technologies - _id: 2671EB66-B435-11E9-9278-68D0E5697425 name: Coherent on-chip conversion of superconducting qubit signals from microwaves to optical frequencies publication: Nature Communications publication_identifier: issn: - 2041-1723 publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: link: - relation: erratum url: https://doi.org/10.1038/s41467-020-18912-9 - description: News on IST Homepage relation: press_release url: https://ist.ac.at/en/news/how-to-transport-microwave-quantum-information-via-optical-fiber/ record: - id: '13056' relation: research_data status: public status: public title: Converting microwave and telecom photons with a silicon photonic nanomechanical interface tmp: image: /images/cc_by.png legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) short: CC BY (4.0) type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 11 year: '2020' ... --- _id: '8755' abstract: - lang: eng text: 'The superconducting circuit community has recently discovered the promising potential of superinductors. These circuit elements have a characteristic impedance exceeding the resistance quantum RQ ≈ 6.45 kΩ which leads to a suppression of ground state charge fluctuations. Applications include the realization of hardware protected qubits for fault tolerant quantum computing, improved coupling to small dipole moment objects and defining a new quantum metrology standard for the ampere. In this work we refute the widespread notion that superinductors can only be implemented based on kinetic inductance, i.e. using disordered superconductors or Josephson junction arrays. We present modeling, fabrication and characterization of 104 planar aluminum coil resonators with a characteristic impedance up to 30.9 kΩ at 5.6 GHz and a capacitance down to ≤ 1 fF, with lowloss and a power handling reaching 108 intra-cavity photons. Geometric superinductors are free of uncontrolled tunneling events and offer high reproducibility, linearity and the ability to couple magnetically - properties that significantly broaden the scope of future quantum circuits. ' acknowledged_ssus: - _id: NanoFab acknowledgement: "The authors acknowledge the support from I. Prieto and the IST Nanofabrication Facility. This work was supported by IST Austria and a NOMIS foundation research grant and the Austrian Science Fund (FWF) through BeyondC (F71). MP is the recipient of a P¨ottinger scholarship at IST Austria. JMF acknowledges support from the European Union’s Horizon 2020 research and innovation programs under grant agreement No 732894 (FET Proactive HOT), 862644 (FET Open QUARTET), and the European Research Council under grant agreement\r\nnumber 758053 (ERC StG QUNNECT). " article_number: '044055' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Matilda full_name: Peruzzo, Matilda id: 3F920B30-F248-11E8-B48F-1D18A9856A87 last_name: Peruzzo orcid: 0000-0002-3415-4628 - first_name: Andrea full_name: Trioni, Andrea id: 42F71B44-F248-11E8-B48F-1D18A9856A87 last_name: Trioni - first_name: Farid full_name: Hassani, Farid id: 2AED110C-F248-11E8-B48F-1D18A9856A87 last_name: Hassani orcid: 0000-0001-6937-5773 - first_name: Martin full_name: Zemlicka, Martin id: 2DCF8DE6-F248-11E8-B48F-1D18A9856A87 last_name: Zemlicka - first_name: Johannes M full_name: Fink, Johannes M id: 4B591CBA-F248-11E8-B48F-1D18A9856A87 last_name: Fink orcid: 0000-0001-8112-028X citation: ama: Peruzzo M, Trioni A, Hassani F, Zemlicka M, Fink JM. Surpassing the resistance quantum with a geometric superinductor. Physical Review Applied. 2020;14(4). doi:10.1103/PhysRevApplied.14.044055 apa: Peruzzo, M., Trioni, A., Hassani, F., Zemlicka, M., & Fink, J. M. (2020). Surpassing the resistance quantum with a geometric superinductor. Physical Review Applied. American Physical Society. https://doi.org/10.1103/PhysRevApplied.14.044055 chicago: Peruzzo, Matilda, Andrea Trioni, Farid Hassani, Martin Zemlicka, and Johannes M Fink. “Surpassing the Resistance Quantum with a Geometric Superinductor.” Physical Review Applied. American Physical Society, 2020. https://doi.org/10.1103/PhysRevApplied.14.044055. ieee: M. Peruzzo, A. Trioni, F. Hassani, M. Zemlicka, and J. M. Fink, “Surpassing the resistance quantum with a geometric superinductor,” Physical Review Applied, vol. 14, no. 4. American Physical Society, 2020. ista: Peruzzo M, Trioni A, Hassani F, Zemlicka M, Fink JM. 2020. Surpassing the resistance quantum with a geometric superinductor. Physical Review Applied. 14(4), 044055. mla: Peruzzo, Matilda, et al. “Surpassing the Resistance Quantum with a Geometric Superinductor.” Physical Review Applied, vol. 14, no. 4, 044055, American Physical Society, 2020, doi:10.1103/PhysRevApplied.14.044055. short: M. Peruzzo, A. Trioni, F. Hassani, M. Zemlicka, J.M. Fink, Physical Review Applied 14 (2020). date_created: 2020-11-15T23:01:17Z date_published: 2020-10-29T00:00:00Z date_updated: 2024-08-07T07:11:55Z day: '29' ddc: - '530' department: - _id: JoFi doi: 10.1103/PhysRevApplied.14.044055 ec_funded: 1 external_id: arxiv: - '2007.01644' isi: - '000582797300003' file: - access_level: open_access checksum: 2a634abe75251ae7628cd54c8a4ce2e8 content_type: application/pdf creator: dernst date_created: 2021-03-29T11:43:20Z date_updated: 2021-03-29T11:43:20Z file_id: '9300' file_name: 2020_PhysReviewApplied_Peruzzo.pdf file_size: 2607823 relation: main_file success: 1 file_date_updated: 2021-03-29T11:43:20Z has_accepted_license: '1' intvolume: ' 14' isi: 1 issue: '4' language: - iso: eng month: '10' oa: 1 oa_version: Published Version project: - _id: 26927A52-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: F07105 name: Integrating superconducting quantum circuits - _id: 257EB838-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '732894' name: Hybrid Optomechanical Technologies - _id: 237CBA6C-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '862644' name: Quantum readout techniques and technologies - _id: 26336814-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '758053' name: A Fiber Optic Transceiver for Superconducting Qubits publication: Physical Review Applied publication_identifier: eissn: - '23317019' publication_status: published publisher: American Physical Society quality_controlled: '1' related_material: record: - id: '13070' relation: research_data status: public - id: '9920' relation: dissertation_contains status: public scopus_import: '1' status: public title: Surpassing the resistance quantum with a geometric superinductor type: journal_article user_id: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 14 year: '2020' ... --- _id: '8831' abstract: - lang: eng text: Holes in planar Ge have high mobilities, strong spin-orbit interaction and electrically tunable g-factors, and are therefore emerging as a promising candidate for hybrid superconductorsemiconductor devices. This is further motivated by the observation of supercurrent transport in planar Ge Josephson Field effect transistors (JoFETs). A key challenge towards hybrid germanium quantum technology is the design of high quality interfaces and superconducting contacts that are robust against magnetic fields. By combining the assets of Al, which has a long superconducting coherence, and Nb, which has a significant superconducting gap, we form low-disordered JoFETs with large ICRN products that are capable of withstanding high magnetic fields. We furthermore demonstrate the ability of phase-biasing individual JoFETs opening up an avenue to explore topological superconductivity in planar Ge. The persistence of superconductivity in the reported hybrid devices beyond 1.8 T paves the way towards integrating spin qubits and proximity-induced superconductivity on the same chip. acknowledged_ssus: - _id: M-Shop - _id: NanoFab acknowledgement: "This research and related results were made possible with the support of the NOMIS Foundation. This research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA Machine Shop and the nanofabrication facility, the European Union’s Horizon 2020 research and innovation program under the Marie Sklodowska-Curie grant agreement #844511 and the Grant Agreement #862046. ICN2 acknowledge funding from Generalitat de Catalunya 2017 SGR 327. ICN2 is supported by the Severo Ochoa\r\nprogram from Spanish MINECO (Grant No. SEV2017-0706) and is funded by the CERCA Programme / Generalitat de Catalunya. Part of the present work has been performed in the framework of Universitat Aut`onoma de Barcelona Materials Science PhD program. The HAADF-STEM microscopy was conducted in the Laboratorio de Microscopias Avanzadas at Instituto de Nanociencia de Aragon-Universidad de Zaragoza. Authors acknowledge the LMA-INA for offering access to their instruments and expertise. We acknowledge support from CSIC Research Platform on Quantum Technologies PTI-001. This project has received funding from\r\nthe European Union’s Horizon 2020 research and innovation programme under grant agreement No 823717 – ESTEEM3. M.B. acknowledges support from SUR Generalitat de Catalunya and the EU Social Fund; project ref. 2020 FI 00103. GS and MV acknowledge support through a projectruimte grant associated with the Netherlands Organization of Scientific Research (NWO)." article_number: '2012.00322' article_processing_charge: No arxiv: 1 author: - first_name: Kushagra full_name: Aggarwal, Kushagra id: b22ab905-3539-11eb-84c3-fc159dcd79cb last_name: Aggarwal orcid: 0000-0001-9985-9293 - first_name: Andrea C full_name: Hofmann, Andrea C id: 340F461A-F248-11E8-B48F-1D18A9856A87 last_name: Hofmann - first_name: Daniel full_name: Jirovec, Daniel id: 4C473F58-F248-11E8-B48F-1D18A9856A87 last_name: Jirovec orcid: 0000-0002-7197-4801 - first_name: Ivan full_name: Prieto Gonzalez, Ivan id: 2A307FE2-F248-11E8-B48F-1D18A9856A87 last_name: Prieto Gonzalez orcid: 0000-0002-7370-5357 - first_name: Amir full_name: Sammak, Amir last_name: Sammak - first_name: Marc full_name: Botifoll, Marc last_name: Botifoll - first_name: Sara full_name: Marti-Sanchez, Sara last_name: Marti-Sanchez - first_name: Menno full_name: Veldhorst, Menno last_name: Veldhorst - first_name: Jordi full_name: Arbiol, Jordi last_name: Arbiol - first_name: Giordano full_name: Scappucci, Giordano last_name: Scappucci - first_name: Georgios full_name: Katsaros, Georgios id: 38DB5788-F248-11E8-B48F-1D18A9856A87 last_name: Katsaros orcid: 0000-0001-8342-202X citation: ama: Aggarwal K, Hofmann AC, Jirovec D, et al. Enhancement of proximity induced superconductivity in planar Germanium. arXiv. apa: Aggarwal, K., Hofmann, A. C., Jirovec, D., Prieto Gonzalez, I., Sammak, A., Botifoll, M., … Katsaros, G. (n.d.). Enhancement of proximity induced superconductivity in planar Germanium. arXiv. chicago: Aggarwal, Kushagra, Andrea C Hofmann, Daniel Jirovec, Ivan Prieto Gonzalez, Amir Sammak, Marc Botifoll, Sara Marti-Sanchez, et al. “Enhancement of Proximity Induced Superconductivity in Planar Germanium.” ArXiv, n.d. ieee: K. Aggarwal et al., “Enhancement of proximity induced superconductivity in planar Germanium,” arXiv. . ista: Aggarwal K, Hofmann AC, Jirovec D, Prieto Gonzalez I, Sammak A, Botifoll M, Marti-Sanchez S, Veldhorst M, Arbiol J, Scappucci G, Katsaros G. Enhancement of proximity induced superconductivity in planar Germanium. arXiv, 2012.00322. mla: Aggarwal, Kushagra, et al. “Enhancement of Proximity Induced Superconductivity in Planar Germanium.” ArXiv, 2012.00322. short: K. Aggarwal, A.C. Hofmann, D. Jirovec, I. Prieto Gonzalez, A. Sammak, M. Botifoll, S. Marti-Sanchez, M. Veldhorst, J. Arbiol, G. Scappucci, G. Katsaros, ArXiv (n.d.). date_created: 2020-12-02T10:42:53Z date_published: 2020-12-02T00:00:00Z date_updated: 2024-03-25T23:30:14Z day: '02' ddc: - '530' department: - _id: GeKa ec_funded: 1 external_id: arxiv: - '2012.00322' file: - access_level: open_access checksum: 22a612e206232fa94b138b2c2f957582 content_type: application/pdf creator: gkatsaro date_created: 2020-12-02T10:42:31Z date_updated: 2020-12-02T10:42:31Z file_id: '8832' file_name: Superconducting_2D_Ge.pdf file_size: 1697939 relation: main_file file_date_updated: 2020-12-02T10:42:31Z has_accepted_license: '1' language: - iso: eng month: '12' oa: 1 oa_version: Submitted Version project: - _id: 262116AA-B435-11E9-9278-68D0E5697425 name: Hybrid Semiconductor - Superconductor Quantum Devices - _id: 26A151DA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '844511' name: Majorana bound states in Ge/SiGe heterostructures - _id: 237E5020-32DE-11EA-91FC-C7463DDC885E call_identifier: H2020 grant_number: '862046' name: TOPOLOGICALLY PROTECTED AND SCALABLE QUANTUM BITS publication: arXiv publication_status: submitted related_material: record: - id: '10559' relation: later_version status: public - id: '8834' relation: research_data status: public - id: '10058' relation: dissertation_contains status: public status: public title: Enhancement of proximity induced superconductivity in planar Germanium type: preprint user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2020' ...