[{"volume":20,"date_created":"2023-11-12T23:00:55Z","article_type":"original","scopus_import":"1","day":"20","author":[{"last_name":"Zemlicka","id":"2DCF8DE6-F248-11E8-B48F-1D18A9856A87","full_name":"Zemlicka, Martin","first_name":"Martin"},{"last_name":"Redchenko","id":"2C21D6E8-F248-11E8-B48F-1D18A9856A87","full_name":"Redchenko, Elena","first_name":"Elena"},{"orcid":"0000-0002-3415-4628","first_name":"Matilda","full_name":"Peruzzo, Matilda","id":"3F920B30-F248-11E8-B48F-1D18A9856A87","last_name":"Peruzzo"},{"orcid":"0000-0001-6937-5773","first_name":"Farid","last_name":"Hassani","id":"2AED110C-F248-11E8-B48F-1D18A9856A87","full_name":"Hassani, Farid"},{"first_name":"Andrea","full_name":"Trioni, Andrea","id":"42F71B44-F248-11E8-B48F-1D18A9856A87","last_name":"Trioni"},{"orcid":"0000-0003-0415-1423","first_name":"Shabir","full_name":"Barzanjeh, Shabir","id":"2D25E1F6-F248-11E8-B48F-1D18A9856A87","last_name":"Barzanjeh"},{"first_name":"Johannes M","orcid":"0000-0001-8112-028X","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M","last_name":"Fink"}],"title":"Compact vacuum-gap transmon qubits: Selective and sensitive probes for superconductor surface losses","oa_version":"Preprint","publication_status":"published","publication_identifier":{"eissn":["2331-7019"]},"acknowledged_ssus":[{"_id":"NanoFab"}],"abstract":[{"text":"State-of-the-art transmon qubits rely on large capacitors, which systematically improve their coherence due to reduced surface-loss participation. However, this approach increases both the footprint and the parasitic cross-coupling and is ultimately limited by radiation losses—a potential roadblock for scaling up quantum processors to millions of qubits. In this work we present transmon qubits with sizes as low as 36 × 39 µm2 with  100-nm-wide vacuum-gap capacitors that are micromachined from commercial silicon-on-insulator wafers and shadow evaporated with aluminum. We achieve a vacuum participation ratio up to 99.6% in an in-plane design that is compatible with standard coplanar circuits. Qubit relaxationtime measurements for small gaps with high zero-point electric field variance of up to 22 V/m reveal a double exponential decay indicating comparably strong qubit interaction with long-lived two-level systems. The exceptionally high selectivity of up to 20 dB to the superconductor-vacuum interface allows us to precisely back out the sub-single-photon dielectric loss tangent of aluminum oxide previously exposed to ambient conditions. In terms of future scaling potential, we achieve a ratio of qubit quality factor to a footprint area equal to 20 µm−2, which is comparable with the highest T1 devices relying on larger geometries, a value that could improve substantially for lower surface-loss superconductors. ","lang":"eng"}],"intvolume":"        20","department":[{"_id":"JoFi"}],"article_number":"044054","arxiv":1,"month":"10","citation":{"mla":"Zemlicka, Martin, et al. “Compact Vacuum-Gap Transmon Qubits: Selective and Sensitive Probes for Superconductor Surface Losses.” <i>Physical Review Applied</i>, vol. 20, no. 4, 044054, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/PhysRevApplied.20.044054\">10.1103/PhysRevApplied.20.044054</a>.","apa":"Zemlicka, M., Redchenko, E., Peruzzo, M., Hassani, F., Trioni, A., Barzanjeh, S., &#38; Fink, J. M. (2023). Compact vacuum-gap transmon qubits: Selective and sensitive probes for superconductor surface losses. <i>Physical Review Applied</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevApplied.20.044054\">https://doi.org/10.1103/PhysRevApplied.20.044054</a>","ista":"Zemlicka M, Redchenko E, Peruzzo M, Hassani F, Trioni A, Barzanjeh S, Fink JM. 2023. Compact vacuum-gap transmon qubits: Selective and sensitive probes for superconductor surface losses. Physical Review Applied. 20(4), 044054.","chicago":"Zemlicka, Martin, Elena Redchenko, Matilda Peruzzo, Farid Hassani, Andrea Trioni, Shabir Barzanjeh, and Johannes M Fink. “Compact Vacuum-Gap Transmon Qubits: Selective and Sensitive Probes for Superconductor Surface Losses.” <i>Physical Review Applied</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/PhysRevApplied.20.044054\">https://doi.org/10.1103/PhysRevApplied.20.044054</a>.","short":"M. Zemlicka, E. Redchenko, M. Peruzzo, F. Hassani, A. Trioni, S. Barzanjeh, J.M. Fink, Physical Review Applied 20 (2023).","ieee":"M. Zemlicka <i>et al.</i>, “Compact vacuum-gap transmon qubits: Selective and sensitive probes for superconductor surface losses,” <i>Physical Review Applied</i>, vol. 20, no. 4. American Physical Society, 2023.","ama":"Zemlicka M, Redchenko E, Peruzzo M, et al. Compact vacuum-gap transmon qubits: Selective and sensitive probes for superconductor surface losses. <i>Physical Review Applied</i>. 2023;20(4). doi:<a href=\"https://doi.org/10.1103/PhysRevApplied.20.044054\">10.1103/PhysRevApplied.20.044054</a>"},"issue":"4","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1,"language":[{"iso":"eng"}],"_id":"14517","date_updated":"2024-08-07T07:11:55Z","type":"journal_article","article_processing_charge":"No","doi":"10.1103/PhysRevApplied.20.044054","publisher":"American Physical Society","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2206.14104"}],"quality_controlled":"1","year":"2023","related_material":{"record":[{"id":"14520","status":"public","relation":"research_data"}]},"external_id":{"arxiv":["2206.14104"]},"ec_funded":1,"acknowledgement":"This work was supported by the Austrian Science Fund (FWF) through BeyondC (F7105), the European Research Council under Grant Agreement No. 758053 (ERC StG QUNNECT) and a NOMIS foundation research grant. M.Z. was the recipient of a SAIA scholarship, E.R. of\r\na DOC fellowship of the Austrian Academy of Sciences, and M.P. of a Pöttinger scholarship at IST Austria. S.B. acknowledges support from Marie Skłodowska Curie Program No. 707438 (MSC-IF SUPEREOM). J.M.F. acknowledges support from the Horizon Europe Program HORIZON-CL4-2022-QUANTUM-01-SGA via Project No. 101113946 OpenSuperQPlus100 and the ISTA Nanofabrication Facility.","date_published":"2023-10-20T00:00:00Z","status":"public","publication":"Physical Review Applied","project":[{"grant_number":"F07105","name":"Integrating superconducting quantum circuits","call_identifier":"FWF","_id":"26927A52-B435-11E9-9278-68D0E5697425"},{"_id":"26336814-B435-11E9-9278-68D0E5697425","grant_number":"758053","name":"A Fiber Optic Transceiver for Superconducting Qubits","call_identifier":"H2020"},{"name":"Protected states of quantum matter","_id":"eb9b30ac-77a9-11ec-83b8-871f581d53d2"},{"call_identifier":"H2020","grant_number":"707438","name":"Microwave-to-Optical Quantum Link: Quantum Teleportation and Quantum Illumination with cavity Optomechanics SUPEREOM","_id":"258047B6-B435-11E9-9278-68D0E5697425"},{"_id":"bdb7cfc1-d553-11ed-ba76-d2eaab167738","name":"Open Superconducting Quantum Computers (OpenSuperQPlus)","grant_number":"101080139"}]},{"year":"2023","month":"10","department":[{"_id":"JoFi"}],"article_number":"LM1F.3","language":[{"iso":"eng"}],"publication":"Frontiers in Optics + Laser Science 2023","status":"public","citation":{"ista":"Sahu R, Qiu L, Hease WJ, Arnold GM, Minoguchi Y, Rabl P, Fink JM. 2023. Entangling microwaves and telecom wavelength light. Frontiers in Optics + Laser Science 2023. Laser Science, LM1F.3.","chicago":"Sahu, Rishabh, Liu Qiu, William J Hease, Georg M Arnold, Yuri Minoguchi, Peter Rabl, and Johannes M Fink. “Entangling Microwaves and Telecom Wavelength Light.” In <i>Frontiers in Optics + Laser Science 2023</i>. Optica Publishing Group, 2023. <a href=\"https://doi.org/10.1364/ls.2023.lm1f.3\">https://doi.org/10.1364/ls.2023.lm1f.3</a>.","apa":"Sahu, R., Qiu, L., Hease, W. J., Arnold, G. M., Minoguchi, Y., Rabl, P., &#38; Fink, J. M. (2023). Entangling microwaves and telecom wavelength light. In <i>Frontiers in Optics + Laser Science 2023</i>. Tacoma, WA, United States: Optica Publishing Group. <a href=\"https://doi.org/10.1364/ls.2023.lm1f.3\">https://doi.org/10.1364/ls.2023.lm1f.3</a>","mla":"Sahu, Rishabh, et al. “Entangling Microwaves and Telecom Wavelength Light.” <i>Frontiers in Optics + Laser Science 2023</i>, LM1F.3, Optica Publishing Group, 2023, doi:<a href=\"https://doi.org/10.1364/ls.2023.lm1f.3\">10.1364/ls.2023.lm1f.3</a>.","ama":"Sahu R, Qiu L, Hease WJ, et al. Entangling microwaves and telecom wavelength light. In: <i>Frontiers in Optics + Laser Science 2023</i>. Optica Publishing Group; 2023. doi:<a href=\"https://doi.org/10.1364/ls.2023.lm1f.3\">10.1364/ls.2023.lm1f.3</a>","ieee":"R. Sahu <i>et al.</i>, “Entangling microwaves and telecom wavelength light,” in <i>Frontiers in Optics + Laser Science 2023</i>, Tacoma, WA, United States, 2023.","short":"R. Sahu, L. Qiu, W.J. Hease, G.M. Arnold, Y. Minoguchi, P. Rabl, J.M. Fink, in:, Frontiers in Optics + Laser Science 2023, Optica Publishing Group, 2023."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_published":"2023-10-01T00:00:00Z","conference":{"location":"Tacoma, WA, United States","name":"Laser Science","start_date":"2023-10-09","end_date":"2023-10-12"},"article_processing_charge":"No","day":"01","author":[{"orcid":"0000-0001-6264-2162","first_name":"Rishabh","last_name":"Sahu","full_name":"Sahu, Rishabh","id":"47D26E34-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Liu","full_name":"Qiu, Liu","last_name":"Qiu"},{"first_name":"William J","orcid":"0000-0001-9868-2166","full_name":"Hease, William J","id":"29705398-F248-11E8-B48F-1D18A9856A87","last_name":"Hease"},{"orcid":"0000-0003-1397-7876","first_name":"Georg M","full_name":"Arnold, Georg M","id":"3770C838-F248-11E8-B48F-1D18A9856A87","last_name":"Arnold"},{"first_name":"Yuri","last_name":"Minoguchi","full_name":"Minoguchi, Yuri"},{"full_name":"Rabl, Peter","last_name":"Rabl","first_name":"Peter"},{"first_name":"Johannes M","orcid":"0000-0001-8112-028X","last_name":"Fink","full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87"}],"doi":"10.1364/ls.2023.lm1f.3","publisher":"Optica Publishing Group","title":"Entangling microwaves and telecom wavelength light","oa_version":"None","_id":"14872","date_updated":"2024-01-24T08:43:28Z","date_created":"2024-01-22T12:29:41Z","type":"conference","abstract":[{"text":"We entangled microwave and optical photons for the first time as verified by a measured two-mode vacuum squeezing of 0.7 dB. This electro-optic entanglement is the key resource needed to connect cryogenic quantum circuits.","lang":"eng"}],"publication_identifier":{"isbn":["9781957171296"]},"quality_controlled":"1","publication_status":"published"},{"date_updated":"2025-07-15T09:17:40Z","_id":"13106","type":"dissertation","doi":"10.1126/science.adg3812","article_processing_charge":"No","publisher":"American Association for the Advancement of Science","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2301.03315","open_access":"1"}],"page":"718-721","keyword":["Multidisciplinary"],"year":"2023","isi":1,"external_id":{"arxiv":["2301.03315"],"isi":["000996515200004"]},"related_material":{"record":[{"status":"public","relation":"research_data","id":"13122"}],"link":[{"url":"https://ista.ac.at/en/news/wiring-up-quantum-circuits-with-light/","description":"News on ISTA Website","relation":"press_release"}]},"ec_funded":1,"acknowledgement":"This work was supported by the European Research Council (grant no. 758053, ERC StG QUNNECT) and the European Union’s Horizon 2020 Research and Innovation Program (grant no. 899354, FETopen SuperQuLAN). L.Q. acknowledges generous support from the ISTFELLOW program. W.H. is the recipient of an ISTplus postdoctoral fellowship with funding from the European Union’s Horizon 2020 Research and Innovation Program (Marie Sklodowska-Curie grant no. 754411). G.A. is the recipient of a DOC fellowship of the Austrian Academy of Sciences at IST Austria. J.M.F. acknowledges support from the Austrian Science Fund (FWF) through BeyondC (grant no. F7105) and the European Union’s Horizon 2020 Research and Innovation Program (grant no. 862644, FETopen QUARTET).","date_published":"2023-05-18T00:00:00Z","degree_awarded":"PhD","project":[{"_id":"26336814-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"A Fiber Optic Transceiver for Superconducting Qubits","grant_number":"758053"},{"_id":"9B868D20-BA93-11EA-9121-9846C619BF3A","grant_number":"899354","name":"Quantum Local Area Networks with Superconducting Qubits","call_identifier":"H2020"},{"_id":"260C2330-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships"},{"_id":"26927A52-B435-11E9-9278-68D0E5697425","call_identifier":"FWF","name":"Integrating superconducting quantum circuits","grant_number":"F07105"},{"grant_number":"862644","name":"Quantum readout techniques and technologies","call_identifier":"H2020","_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E"},{"name":"Coherent on-chip conversion of superconducting qubit signals from microwaves to optical frequencies","_id":"2671EB66-B435-11E9-9278-68D0E5697425"}],"status":"public","volume":380,"date_created":"2023-05-31T11:39:24Z","author":[{"first_name":"Rishabh","orcid":"0000-0001-6264-2162","last_name":"Sahu","id":"47D26E34-F248-11E8-B48F-1D18A9856A87","full_name":"Sahu, Rishabh"},{"first_name":"Liu","orcid":"0000-0003-4345-4267","id":"45e99c0d-1eb1-11eb-9b96-ed8ab2983cac","full_name":"Qiu, Liu","last_name":"Qiu"},{"id":"29705398-F248-11E8-B48F-1D18A9856A87","full_name":"Hease, William J","last_name":"Hease","orcid":"0000-0001-9868-2166","first_name":"William J"},{"first_name":"Georg M","orcid":"0000-0003-1397-7876","last_name":"Arnold","id":"3770C838-F248-11E8-B48F-1D18A9856A87","full_name":"Arnold, Georg M"},{"first_name":"Y.","full_name":"Minoguchi, Y.","last_name":"Minoguchi"},{"last_name":"Rabl","full_name":"Rabl, P.","first_name":"P."},{"id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M","last_name":"Fink","first_name":"Johannes M","orcid":"0000-0001-8112-028X"}],"day":"18","oa_version":"Preprint","title":"Entangling microwaves with light","publication_status":"published","publication_identifier":{"eissn":["1095-9203"],"issn":["0036-8075"]},"abstract":[{"text":"Quantum entanglement is a key resource in currently developed quantum technologies. Sharing this fragile property between superconducting microwave circuits and optical or atomic systems would enable new functionalities, but this has been hindered by an energy scale mismatch of >104 and the resulting mutually imposed loss and noise. In this work, we created and verified entanglement between microwave and optical fields in a millikelvin environment. Using an optically pulsed superconducting electro-optical device, we show entanglement between propagating microwave and optical fields in the continuous variable domain. This achievement not only paves the way for entanglement between superconducting circuits and telecom wavelength light, but also has wide-ranging implications for hybrid quantum networks in the context of modularization, scaling, sensing, and cross-platform verification.","lang":"eng"}],"intvolume":"       380","department":[{"_id":"JoFi"}],"arxiv":1,"month":"05","citation":{"apa":"Sahu, R., Qiu, L., Hease, W. J., Arnold, G. M., Minoguchi, Y., Rabl, P., &#38; Fink, J. M. (2023). <i>Entangling microwaves with light</i>. American Association for the Advancement of Science. <a href=\"https://doi.org/10.1126/science.adg3812\">https://doi.org/10.1126/science.adg3812</a>","mla":"Sahu, Rishabh, et al. <i>Entangling Microwaves with Light</i>. Vol. 380, American Association for the Advancement of Science, 2023, pp. 718–21, doi:<a href=\"https://doi.org/10.1126/science.adg3812\">10.1126/science.adg3812</a>.","chicago":"Sahu, Rishabh, Liu Qiu, William J Hease, Georg M Arnold, Y. Minoguchi, P. Rabl, and Johannes M Fink. “Entangling Microwaves with Light.” American Association for the Advancement of Science, 2023. <a href=\"https://doi.org/10.1126/science.adg3812\">https://doi.org/10.1126/science.adg3812</a>.","ista":"Sahu R, Qiu L, Hease WJ, Arnold GM, Minoguchi Y, Rabl P, Fink JM. 2023. Entangling microwaves with light. American Association for the Advancement of Science.","ieee":"R. Sahu <i>et al.</i>, “Entangling microwaves with light,” American Association for the Advancement of Science, 2023.","short":"R. Sahu, L. Qiu, W.J. Hease, G.M. Arnold, Y. Minoguchi, P. Rabl, J.M. Fink, Entangling Microwaves with Light, American Association for the Advancement of Science, 2023.","ama":"Sahu R, Qiu L, Hease WJ, et al. Entangling microwaves with light. 2023;380:718-721. doi:<a href=\"https://doi.org/10.1126/science.adg3812\">10.1126/science.adg3812</a>"},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1,"language":[{"iso":"eng"}]},{"publisher":"Springer Nature","doi":"10.1038/s41467-023-38761-6","article_processing_charge":"No","type":"journal_article","date_updated":"2024-08-07T07:11:50Z","_id":"13117","ddc":["530"],"quality_controlled":"1","external_id":{"arxiv":["2205.03293"],"isi":["001001099700002"]},"related_material":{"record":[{"id":"13124","relation":"research_data","status":"public"}]},"isi":1,"year":"2023","project":[{"_id":"26927A52-B435-11E9-9278-68D0E5697425","name":"Integrating superconducting quantum circuits","grant_number":"F07105","call_identifier":"FWF"},{"call_identifier":"H2020","name":"A Fiber Optic Transceiver for Superconducting Qubits","grant_number":"758053","_id":"26336814-B435-11E9-9278-68D0E5697425"},{"name":"Controllable Collective States of Superconducting Qubit Ensembles","_id":"26B354CA-B435-11E9-9278-68D0E5697425"},{"_id":"eb9b30ac-77a9-11ec-83b8-871f581d53d2","name":"Protected states of quantum matter"}],"status":"public","publication":"Nature Communications","date_published":"2023-05-24T00:00:00Z","acknowledgement":"The authors thank W.D. Oliver for discussions, L. Drmic and P. Zielinski for software development, and the MIBA workshop and the IST nanofabrication facility for technical support. This work was supported by the Austrian Science Fund (FWF) through BeyondC (F7105) and IST Austria. E.R. is the recipient of a DOC fellowship of the Austrian Academy of Sciences at IST Austria. J.M.F. and M.Z. acknowledge support from the European Research Council under grant agreement No 758053 (ERC StG QUNNECT) and a NOMIS foundation research grant. The work of A.N.P. and A.V.P. has been supported by the Russian Science Foundation under the grant No 20-12-00194.","ec_funded":1,"oa_version":"Published Version","title":"Tunable directional photon scattering from a pair of superconducting qubits","author":[{"last_name":"Redchenko","full_name":"Redchenko, Elena","id":"2C21D6E8-F248-11E8-B48F-1D18A9856A87","first_name":"Elena"},{"first_name":"Alexander V.","full_name":"Poshakinskiy, Alexander V.","last_name":"Poshakinskiy"},{"first_name":"Riya","full_name":"Sett, Riya","id":"2E6D040E-F248-11E8-B48F-1D18A9856A87","last_name":"Sett"},{"last_name":"Zemlicka","full_name":"Zemlicka, Martin","id":"2DCF8DE6-F248-11E8-B48F-1D18A9856A87","first_name":"Martin"},{"first_name":"Alexander N.","last_name":"Poddubny","full_name":"Poddubny, Alexander N."},{"orcid":"0000-0001-8112-028X","first_name":"Johannes M","last_name":"Fink","full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87"}],"scopus_import":"1","day":"24","article_type":"original","date_created":"2023-06-04T22:01:02Z","volume":14,"tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"intvolume":"        14","abstract":[{"lang":"eng","text":"The ability to control the direction of scattered light is crucial to provide flexibility and scalability for a wide range of on-chip applications, such as integrated photonics, quantum information processing, and nonlinear optics. Tunable directionality can be achieved by applying external magnetic fields that modify optical selection rules, by using nonlinear effects, or interactions with vibrations. However, these approaches are less suitable to control microwave photon propagation inside integrated superconducting quantum devices. Here, we demonstrate on-demand tunable directional scattering based on two periodically modulated transmon qubits coupled to a transmission line at a fixed distance. By changing the relative phase between the modulation tones, we realize unidirectional forward or backward photon scattering. Such an in-situ switchable mirror represents a versatile tool for intra- and inter-chip microwave photonic processors. In the future, a lattice of qubits can be used to realize topological circuits that exhibit strong nonreciprocity or chirality."}],"acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"has_accepted_license":"1","publication_identifier":{"eissn":["2041-1723"]},"publication_status":"published","file_date_updated":"2023-06-06T07:31:20Z","arxiv":1,"month":"05","file":[{"relation":"main_file","checksum":"a857df40f0882859c48a1ff1e2001ec2","success":1,"file_name":"2023_NaturePhysics_Redchenko.pdf","access_level":"open_access","content_type":"application/pdf","file_id":"13123","file_size":1654389,"date_created":"2023-06-06T07:31:20Z","date_updated":"2023-06-06T07:31:20Z","creator":"dernst"}],"article_number":"2998","department":[{"_id":"JoFi"}],"language":[{"iso":"eng"}],"oa":1,"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","citation":{"chicago":"Redchenko, Elena, Alexander V. Poshakinskiy, Riya Sett, Martin Zemlicka, Alexander N. Poddubny, and Johannes M Fink. “Tunable Directional Photon Scattering from a Pair of Superconducting Qubits.” <i>Nature Communications</i>. Springer Nature, 2023. <a href=\"https://doi.org/10.1038/s41467-023-38761-6\">https://doi.org/10.1038/s41467-023-38761-6</a>.","ista":"Redchenko E, Poshakinskiy AV, Sett R, Zemlicka M, Poddubny AN, Fink JM. 2023. Tunable directional photon scattering from a pair of superconducting qubits. Nature Communications. 14, 2998.","mla":"Redchenko, Elena, et al. “Tunable Directional Photon Scattering from a Pair of Superconducting Qubits.” <i>Nature Communications</i>, vol. 14, 2998, Springer Nature, 2023, doi:<a href=\"https://doi.org/10.1038/s41467-023-38761-6\">10.1038/s41467-023-38761-6</a>.","apa":"Redchenko, E., Poshakinskiy, A. V., Sett, R., Zemlicka, M., Poddubny, A. N., &#38; Fink, J. M. (2023). Tunable directional photon scattering from a pair of superconducting qubits. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-023-38761-6\">https://doi.org/10.1038/s41467-023-38761-6</a>","ama":"Redchenko E, Poshakinskiy AV, Sett R, Zemlicka M, Poddubny AN, Fink JM. Tunable directional photon scattering from a pair of superconducting qubits. <i>Nature Communications</i>. 2023;14. doi:<a href=\"https://doi.org/10.1038/s41467-023-38761-6\">10.1038/s41467-023-38761-6</a>","short":"E. Redchenko, A.V. Poshakinskiy, R. Sett, M. Zemlicka, A.N. Poddubny, J.M. Fink, Nature Communications 14 (2023).","ieee":"E. Redchenko, A. V. Poshakinskiy, R. Sett, M. Zemlicka, A. N. Poddubny, and J. M. Fink, “Tunable directional photon scattering from a pair of superconducting qubits,” <i>Nature Communications</i>, vol. 14. Springer Nature, 2023."}},{"related_material":{"record":[{"status":"public","relation":"used_in_publication","id":"13117"}]},"month":"04","year":"2023","department":[{"_id":"JoFi"}],"status":"public","oa":1,"date_published":"2023-04-28T00:00:00Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","citation":{"mla":"Redchenko, Elena, et al. <i>Tunable Directional Photon Scattering from a Pair of Superconducting Qubits</i>. Zenodo, 2023, doi:<a href=\"https://doi.org/10.5281/ZENODO.7858567\">10.5281/ZENODO.7858567</a>.","apa":"Redchenko, E., Poshakinskiy, A., Sett, R., Zemlicka, M., Poddubny, A., &#38; Fink, J. M. (2023). Tunable directional photon scattering from a pair of superconducting qubits. Zenodo. <a href=\"https://doi.org/10.5281/ZENODO.7858567\">https://doi.org/10.5281/ZENODO.7858567</a>","ista":"Redchenko E, Poshakinskiy A, Sett R, Zemlicka M, Poddubny A, Fink JM. 2023. Tunable directional photon scattering from a pair of superconducting qubits, Zenodo, <a href=\"https://doi.org/10.5281/ZENODO.7858567\">10.5281/ZENODO.7858567</a>.","chicago":"Redchenko, Elena, Alexander Poshakinskiy, Riya Sett, Martin Zemlicka, Alexander Poddubny, and Johannes M Fink. “Tunable Directional Photon Scattering from a Pair of Superconducting Qubits.” Zenodo, 2023. <a href=\"https://doi.org/10.5281/ZENODO.7858567\">https://doi.org/10.5281/ZENODO.7858567</a>.","short":"E. Redchenko, A. Poshakinskiy, R. Sett, M. Zemlicka, A. Poddubny, J.M. Fink, (2023).","ieee":"E. Redchenko, A. Poshakinskiy, R. Sett, M. Zemlicka, A. Poddubny, and J. M. Fink, “Tunable directional photon scattering from a pair of superconducting qubits.” Zenodo, 2023.","ama":"Redchenko E, Poshakinskiy A, Sett R, Zemlicka M, Poddubny A, Fink JM. Tunable directional photon scattering from a pair of superconducting qubits. 2023. doi:<a href=\"https://doi.org/10.5281/ZENODO.7858567\">10.5281/ZENODO.7858567</a>"},"publisher":"Zenodo","title":"Tunable directional photon scattering from a pair of superconducting qubits","oa_version":"Published Version","doi":"10.5281/ZENODO.7858567","author":[{"first_name":"Elena","last_name":"Redchenko","full_name":"Redchenko, Elena","id":"2C21D6E8-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Alexander","full_name":"Poshakinskiy, Alexander","last_name":"Poshakinskiy"},{"first_name":"Riya","id":"2E6D040E-F248-11E8-B48F-1D18A9856A87","full_name":"Sett, Riya","last_name":"Sett"},{"full_name":"Zemlicka, Martin","id":"2DCF8DE6-F248-11E8-B48F-1D18A9856A87","last_name":"Zemlicka","first_name":"Martin"},{"first_name":"Alexander","full_name":"Poddubny, Alexander","last_name":"Poddubny"},{"last_name":"Fink","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M","first_name":"Johannes M","orcid":"0000-0001-8112-028X"}],"day":"28","article_processing_charge":"No","type":"research_data_reference","date_created":"2023-06-06T07:36:50Z","date_updated":"2024-09-10T12:23:51Z","_id":"13124","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"abstract":[{"lang":"eng","text":"This dataset comprises all data shown in the figures of the submitted article \"Tunable directional photon scattering from a pair of superconducting qubits\" at arXiv:2205.03293. Additional raw data are available from the corresponding author on reasonable request."}],"ddc":["530"],"main_file_link":[{"url":"https://doi.org/10.5281/zenodo.7858567","open_access":"1"}]},{"file_date_updated":"2023-07-10T10:10:54Z","publication_status":"published","publication_identifier":{"eissn":["2041-1723"]},"has_accepted_license":"1","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"intvolume":"        14","abstract":[{"lang":"eng","text":"Recent quantum technologies have established precise quantum control of various microscopic systems using electromagnetic waves. Interfaces based on cryogenic cavity electro-optic systems are particularly promising, due to the direct interaction between microwave and optical fields in the quantum regime. Quantum optical control of superconducting microwave circuits has been precluded so far due to the weak electro-optical coupling as well as quasi-particles induced by the pump laser. Here we report the coherent control of a superconducting microwave cavity using laser pulses in a multimode electro-optical device at millikelvin temperature with near-unity cooperativity. Both the stationary and instantaneous responses of the microwave and optical modes comply with the coherent electro-optical interaction, and reveal only minuscule amount of excess back-action with an unanticipated time delay. Our demonstration enables wide ranges of applications beyond quantum transductions, from squeezing and quantum non-demolition measurements of microwave fields, to entanglement generation and hybrid quantum networks."}],"volume":14,"date_created":"2023-07-09T22:01:11Z","article_type":"original","day":"24","scopus_import":"1","author":[{"id":"45e99c0d-1eb1-11eb-9b96-ed8ab2983cac","full_name":"Qiu, Liu","last_name":"Qiu","first_name":"Liu","orcid":"0000-0003-4345-4267"},{"orcid":"0000-0001-6264-2162","first_name":"Rishabh","last_name":"Sahu","id":"47D26E34-F248-11E8-B48F-1D18A9856A87","full_name":"Sahu, Rishabh"},{"full_name":"Hease, William J","id":"29705398-F248-11E8-B48F-1D18A9856A87","last_name":"Hease","first_name":"William J","orcid":"0000-0001-9868-2166"},{"first_name":"Georg M","orcid":"0000-0003-1397-7876","full_name":"Arnold, Georg M","id":"3770C838-F248-11E8-B48F-1D18A9856A87","last_name":"Arnold"},{"orcid":"0000-0001-8112-028X","first_name":"Johannes M","full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","last_name":"Fink"}],"title":"Coherent optical control of a superconducting microwave cavity via electro-optical dynamical back-action","oa_version":"Published Version","citation":{"short":"L. Qiu, R. Sahu, W.J. Hease, G.M. Arnold, J.M. Fink, Nature Communications 14 (2023).","ieee":"L. Qiu, R. Sahu, W. J. Hease, G. M. Arnold, and J. M. Fink, “Coherent optical control of a superconducting microwave cavity via electro-optical dynamical back-action,” <i>Nature Communications</i>, vol. 14. Nature Research, 2023.","ama":"Qiu L, Sahu R, Hease WJ, Arnold GM, Fink JM. Coherent optical control of a superconducting microwave cavity via electro-optical dynamical back-action. <i>Nature Communications</i>. 2023;14. doi:<a href=\"https://doi.org/10.1038/s41467-023-39493-3\">10.1038/s41467-023-39493-3</a>","mla":"Qiu, Liu, et al. “Coherent Optical Control of a Superconducting Microwave Cavity via Electro-Optical Dynamical Back-Action.” <i>Nature Communications</i>, vol. 14, 3784, Nature Research, 2023, doi:<a href=\"https://doi.org/10.1038/s41467-023-39493-3\">10.1038/s41467-023-39493-3</a>.","apa":"Qiu, L., Sahu, R., Hease, W. J., Arnold, G. M., &#38; Fink, J. M. (2023). Coherent optical control of a superconducting microwave cavity via electro-optical dynamical back-action. <i>Nature Communications</i>. Nature Research. <a href=\"https://doi.org/10.1038/s41467-023-39493-3\">https://doi.org/10.1038/s41467-023-39493-3</a>","ista":"Qiu L, Sahu R, Hease WJ, Arnold GM, Fink JM. 2023. Coherent optical control of a superconducting microwave cavity via electro-optical dynamical back-action. Nature Communications. 14, 3784.","chicago":"Qiu, Liu, Rishabh Sahu, William J Hease, Georg M Arnold, and Johannes M Fink. “Coherent Optical Control of a Superconducting Microwave Cavity via Electro-Optical Dynamical Back-Action.” <i>Nature Communications</i>. Nature Research, 2023. <a href=\"https://doi.org/10.1038/s41467-023-39493-3\">https://doi.org/10.1038/s41467-023-39493-3</a>."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1,"language":[{"iso":"eng"}],"department":[{"_id":"JoFi"}],"file":[{"file_size":1349134,"date_created":"2023-07-10T10:10:54Z","creator":"alisjak","date_updated":"2023-07-10T10:10:54Z","file_id":"13206","file_name":"2023_NatureComms_Qiu.pdf","success":1,"content_type":"application/pdf","access_level":"open_access","relation":"main_file","checksum":"ec7ccd2c08f90d59cab302fd0d7776a4"}],"article_number":"3784","month":"06","arxiv":1,"quality_controlled":"1","ddc":["000"],"_id":"13200","date_updated":"2024-08-07T07:11:55Z","type":"journal_article","article_processing_charge":"No","doi":"10.1038/s41467-023-39493-3","publisher":"Nature Research","ec_funded":1,"pmid":1,"acknowledgement":"This work was supported by the European Research Council under grant agreement no. 758053 (ERC StG QUNNECT), the European Union’s Horizon 2020 research and innovation program under grant agreement no. 899354 (FETopen SuperQuLAN), and the Austrian Science Fund (FWF) through BeyondC (F7105). L.Q. acknowledges generous support from the ISTFELLOW programme. 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 Skłodowska-Curie grant agreement no. 754411. G.A. is the recipient of a DOC fellowship of the Austrian Academy of Sciences at IST Austria.","date_published":"2023-06-24T00:00:00Z","status":"public","publication":"Nature Communications","project":[{"call_identifier":"H2020","name":"A Fiber Optic Transceiver for Superconducting Qubits","grant_number":"758053","_id":"26336814-B435-11E9-9278-68D0E5697425"},{"_id":"9B868D20-BA93-11EA-9121-9846C619BF3A","call_identifier":"H2020","name":"Quantum Local Area Networks with Superconducting Qubits","grant_number":"899354"},{"name":"QUANTUM INFORMATION SYSTEMS BEYOND CLASSICAL CAPABILITIES / P5- Integration of Superconducting Quantum Circuits","_id":"bdb108fd-d553-11ed-ba76-83dc74a9864f"},{"call_identifier":"H2020","grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships","_id":"260C2330-B435-11E9-9278-68D0E5697425"},{"name":"International IST Postdoc Fellowship Programme","grant_number":"291734","call_identifier":"FP7","_id":"25681D80-B435-11E9-9278-68D0E5697425"},{"_id":"2671EB66-B435-11E9-9278-68D0E5697425","name":"Coherent on-chip conversion of superconducting qubit signals from microwaves to optical frequencies"}],"isi":1,"year":"2023","external_id":{"pmid":["37355691"],"arxiv":["2210.12443"],"isi":["001018100800002"]}},{"date_published":"2023-07-05T00:00:00Z","acknowledgement":"The authors thank J. Koch for discussions and support with the scQubits python package, I. Rozhansky and A. Poddubny for important insights into photon-assisted tunneling, S. Barzanjeh and G. Arnold for theory, E. Redchenko, S. Pepic, the MIBA workshop and the IST nanofabrication facility for technical contributions, as well as L. Drmic, P. Zielinski and R. Sett for software development. We acknowledge the prompt support of Quantum Machines to implement active state preparation with their OPX+. This work was supported by a NOMIS foundation research grant (J.F.), the Austrian Science Fund (FWF) through BeyondC F7105 (J.F.) and IST Austria.","pmid":1,"status":"public","publication":"Nature Communications","project":[{"grant_number":"F07105","name":"Integrating superconducting quantum circuits","call_identifier":"FWF","_id":"26927A52-B435-11E9-9278-68D0E5697425"},{"_id":"2622978C-B435-11E9-9278-68D0E5697425","name":"Hybrid Semiconductor - Superconductor Quantum Devices"}],"external_id":{"pmid":["37407570"],"isi":["001024729900009"]},"isi":1,"year":"2023","quality_controlled":"1","ddc":["530"],"type":"journal_article","_id":"13227","date_updated":"2023-12-13T11:32:25Z","publisher":"Springer Nature","article_processing_charge":"No","doi":"10.1038/s41467-023-39656-2","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","citation":{"ieee":"F. Hassani, M. Peruzzo, L. Kapoor, A. Trioni, M. Zemlicka, and J. M. Fink, “Inductively shunted transmons exhibit noise insensitive plasmon states and a fluxon decay exceeding 3 hours,” <i>Nature Communications</i>, vol. 14. Springer Nature, 2023.","short":"F. Hassani, M. Peruzzo, L. Kapoor, A. Trioni, M. Zemlicka, J.M. Fink, Nature Communications 14 (2023).","ama":"Hassani F, Peruzzo M, Kapoor L, Trioni A, Zemlicka M, Fink JM. Inductively shunted transmons exhibit noise insensitive plasmon states and a fluxon decay exceeding 3 hours. <i>Nature Communications</i>. 2023;14. doi:<a href=\"https://doi.org/10.1038/s41467-023-39656-2\">10.1038/s41467-023-39656-2</a>","apa":"Hassani, F., Peruzzo, M., Kapoor, L., Trioni, A., Zemlicka, M., &#38; Fink, J. M. (2023). Inductively shunted transmons exhibit noise insensitive plasmon states and a fluxon decay exceeding 3 hours. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-023-39656-2\">https://doi.org/10.1038/s41467-023-39656-2</a>","mla":"Hassani, Farid, et al. “Inductively Shunted Transmons Exhibit Noise Insensitive Plasmon States and a Fluxon Decay Exceeding 3 Hours.” <i>Nature Communications</i>, vol. 14, 3968, Springer Nature, 2023, doi:<a href=\"https://doi.org/10.1038/s41467-023-39656-2\">10.1038/s41467-023-39656-2</a>.","chicago":"Hassani, Farid, Matilda Peruzzo, Lucky Kapoor, Andrea Trioni, Martin Zemlicka, and Johannes M Fink. “Inductively Shunted Transmons Exhibit Noise Insensitive Plasmon States and a Fluxon Decay Exceeding 3 Hours.” <i>Nature Communications</i>. Springer Nature, 2023. <a href=\"https://doi.org/10.1038/s41467-023-39656-2\">https://doi.org/10.1038/s41467-023-39656-2</a>.","ista":"Hassani F, Peruzzo M, Kapoor L, Trioni A, Zemlicka M, Fink JM. 2023. Inductively shunted transmons exhibit noise insensitive plasmon states and a fluxon decay exceeding 3 hours. Nature Communications. 14, 3968."},"language":[{"iso":"eng"}],"oa":1,"file":[{"checksum":"a85773b5fe23516f60f7d5d31b55c200","relation":"main_file","content_type":"application/pdf","access_level":"open_access","file_name":"2023_NatureComm_Hassani.pdf","success":1,"file_id":"13248","date_updated":"2023-07-18T08:43:07Z","creator":"dernst","file_size":2899592,"date_created":"2023-07-18T08:43:07Z"}],"article_number":"3968","department":[{"_id":"JoFi"}],"month":"07","file_date_updated":"2023-07-18T08:43:07Z","publication_identifier":{"eissn":["2041-1723"]},"publication_status":"published","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"intvolume":"        14","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"abstract":[{"lang":"eng","text":"Currently available quantum processors are dominated by noise, which severely limits their applicability and motivates the search for new physical qubit encodings. In this work, we introduce the inductively shunted transmon, a weakly flux-tunable superconducting qubit that offers charge offset protection for all levels and a 20-fold reduction in flux dispersion compared to the state-of-the-art resulting in a constant coherence over a full flux quantum. The parabolic confinement provided by the inductive shunt as well as the linearity of the geometric superinductor facilitates a high-power readout that resolves quantum jumps with a fidelity and QND-ness of >90% and without the need for a Josephson parametric amplifier. Moreover, the device reveals quantum tunneling physics between the two prepared fluxon ground states with a measured average decay time of up to 3.5 h. In the future, fast time-domain control of the transition matrix elements could offer a new path forward to also achieve full qubit control in the decay-protected fluxon basis."}],"has_accepted_license":"1","date_created":"2023-07-16T22:01:08Z","article_type":"original","volume":14,"title":"Inductively shunted transmons exhibit noise insensitive plasmon states and a fluxon decay exceeding 3 hours","oa_version":"Published Version","scopus_import":"1","day":"05","author":[{"id":"2AED110C-F248-11E8-B48F-1D18A9856A87","full_name":"Hassani, Farid","last_name":"Hassani","first_name":"Farid","orcid":"0000-0001-6937-5773"},{"orcid":"0000-0002-3415-4628","first_name":"Matilda","last_name":"Peruzzo","id":"3F920B30-F248-11E8-B48F-1D18A9856A87","full_name":"Peruzzo, Matilda"},{"first_name":"Lucky","full_name":"Kapoor, Lucky","id":"84b9700b-15b2-11ec-abd3-831089e67615","last_name":"Kapoor"},{"last_name":"Trioni","id":"42F71B44-F248-11E8-B48F-1D18A9856A87","full_name":"Trioni, Andrea","first_name":"Andrea"},{"first_name":"Martin","last_name":"Zemlicka","id":"2DCF8DE6-F248-11E8-B48F-1D18A9856A87","full_name":"Zemlicka, Martin"},{"first_name":"Johannes M","orcid":"0000-0001-8112-028X","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M","last_name":"Fink"}]},{"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","citation":{"ama":"Mukhopadhyay S, Senior JL, Saez Mollejo J, et al. Superconductivity from a melted insulator in Josephson junction arrays. <i>Nature Physics</i>. 2023;19:1630-1635. doi:<a href=\"https://doi.org/10.1038/s41567-023-02161-w\">10.1038/s41567-023-02161-w</a>","ieee":"S. Mukhopadhyay <i>et al.</i>, “Superconductivity from a melted insulator in Josephson junction arrays,” <i>Nature Physics</i>, vol. 19. Springer Nature, pp. 1630–1635, 2023.","short":"S. Mukhopadhyay, J.L. Senior, J. Saez Mollejo, D. Puglia, M. Zemlicka, J.M. Fink, A.P. Higginbotham, Nature Physics 19 (2023) 1630–1635.","chicago":"Mukhopadhyay, Soham, Jorden L Senior, Jaime Saez Mollejo, Denise Puglia, Martin Zemlicka, Johannes M Fink, and Andrew P Higginbotham. “Superconductivity from a Melted Insulator in Josephson Junction Arrays.” <i>Nature Physics</i>. Springer Nature, 2023. <a href=\"https://doi.org/10.1038/s41567-023-02161-w\">https://doi.org/10.1038/s41567-023-02161-w</a>.","ista":"Mukhopadhyay S, Senior JL, Saez Mollejo J, Puglia D, Zemlicka M, Fink JM, Higginbotham AP. 2023. Superconductivity from a melted insulator in Josephson junction arrays. Nature Physics. 19, 1630–1635.","apa":"Mukhopadhyay, S., Senior, J. L., Saez Mollejo, J., Puglia, D., Zemlicka, M., Fink, J. M., &#38; Higginbotham, A. P. (2023). Superconductivity from a melted insulator in Josephson junction arrays. <i>Nature Physics</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41567-023-02161-w\">https://doi.org/10.1038/s41567-023-02161-w</a>","mla":"Mukhopadhyay, Soham, et al. “Superconductivity from a Melted Insulator in Josephson Junction Arrays.” <i>Nature Physics</i>, vol. 19, Springer Nature, 2023, pp. 1630–35, doi:<a href=\"https://doi.org/10.1038/s41567-023-02161-w\">10.1038/s41567-023-02161-w</a>."},"language":[{"iso":"eng"}],"oa":1,"file":[{"date_created":"2024-01-29T11:25:38Z","file_size":1977706,"creator":"dernst","date_updated":"2024-01-29T11:25:38Z","file_id":"14899","success":1,"file_name":"2023_NaturePhysics_Mukhopadhyay.pdf","access_level":"open_access","content_type":"application/pdf","relation":"main_file","checksum":"1fc86d71bfbf836e221c1e925343adc5"}],"department":[{"_id":"GradSch"},{"_id":"AnHi"},{"_id":"JoFi"}],"month":"11","file_date_updated":"2024-01-29T11:25:38Z","publication_identifier":{"eissn":["1745-2481"],"issn":["1745-2473"]},"publication_status":"published","acknowledged_ssus":[{"_id":"M-Shop"},{"_id":"NanoFab"}],"tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"intvolume":"        19","abstract":[{"text":"Arrays of Josephson junctions are governed by a competition between superconductivity and repulsive Coulomb interactions, and are expected to exhibit diverging low-temperature resistance when interactions exceed a critical level. Here we report a study of the transport and microwave response of Josephson arrays with interactions exceeding this level. Contrary to expectations, we observe that the array resistance drops dramatically as the temperature is decreased—reminiscent of superconducting behaviour—and then saturates at low temperature. Applying a magnetic field, we eventually observe a transition to a highly resistive regime. These observations can be understood within a theoretical picture that accounts for the effect of thermal fluctuations on the insulating phase. On the basis of the agreement between experiment and theory, we suggest that apparent superconductivity in our Josephson arrays arises from melting the zero-temperature insulator.","lang":"eng"}],"has_accepted_license":"1","date_created":"2023-08-11T07:41:17Z","article_type":"original","volume":19,"title":"Superconductivity from a melted insulator in Josephson junction arrays","oa_version":"Published Version","scopus_import":"1","day":"01","author":[{"id":"FDE60288-A89D-11E9-947F-1AF6E5697425","full_name":"Mukhopadhyay, Soham","last_name":"Mukhopadhyay","first_name":"Soham"},{"orcid":"0000-0002-0672-9295","first_name":"Jorden L","full_name":"Senior, Jorden L","id":"5479D234-2D30-11EA-89CC-40953DDC885E","last_name":"Senior"},{"full_name":"Saez Mollejo, Jaime","id":"e0390f72-f6e0-11ea-865d-862393336714","last_name":"Saez Mollejo","first_name":"Jaime"},{"id":"4D495994-AE37-11E9-AC72-31CAE5697425","full_name":"Puglia, Denise","last_name":"Puglia","first_name":"Denise","orcid":"0000-0003-1144-2763"},{"first_name":"Martin","full_name":"Zemlicka, Martin","id":"2DCF8DE6-F248-11E8-B48F-1D18A9856A87","last_name":"Zemlicka"},{"last_name":"Fink","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M","orcid":"0000-0001-8112-028X","first_name":"Johannes M"},{"last_name":"Higginbotham","full_name":"Higginbotham, Andrew P","id":"4AD6785A-F248-11E8-B48F-1D18A9856A87","first_name":"Andrew P","orcid":"0000-0003-2607-2363"}],"acknowledgement":"We thank D. Haviland, J. Pekola, C. Ciuti, A. Bubis and A. Shnirman for helpful feedback on the paper. This research was supported by the Scientific Service Units of IST Austria through resources provided by the MIBA Machine Shop and the Nanofabrication Facility. Work supported by the Austrian FWF grant P33692-N (S.M., J.S. and A.P.H.), the European Union’s Horizon 2020 Research and Innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 754411 (J.S.) and a NOMIS foundation research grant (J.M.F. and A.P.H.).","date_published":"2023-11-01T00:00:00Z","ec_funded":1,"status":"public","publication":"Nature Physics","project":[{"grant_number":"P33692","name":"Cavity electromechanics across a quantum phase transition","_id":"0aa3608a-070f-11eb-9043-e9cd8a2bd931"},{"grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","_id":"260C2330-B435-11E9-9278-68D0E5697425"},{"_id":"eb9b30ac-77a9-11ec-83b8-871f581d53d2","name":"Protected states of quantum matter"},{"name":"Protected states of quantum matter","_id":"bd5b4ec5-d553-11ed-ba76-a6eedb083344"}],"keyword":["General Physics and Astronomy"],"external_id":{"isi":["001054563800006"]},"year":"2023","isi":1,"quality_controlled":"1","ddc":["530"],"page":"1630-1635","type":"journal_article","_id":"14032","date_updated":"2024-01-29T11:27:49Z","publisher":"Springer Nature","article_processing_charge":"Yes (in subscription journal)","doi":"10.1038/s41567-023-02161-w"},{"date_updated":"2024-10-29T09:11:06Z","_id":"10924","type":"journal_article","doi":"10.1038/s41467-022-28924-2","article_processing_charge":"No","publisher":"Springer Nature","quality_controlled":"1","ddc":["530"],"year":"2022","isi":1,"external_id":{"isi":["000767892300013"],"arxiv":["2107.08303"]},"related_material":{"record":[{"relation":"dissertation_contains","status":"public","id":"12900"},{"status":"public","relation":"dissertation_contains","id":"13175"}]},"ec_funded":1,"acknowledgement":"The authors thank S. Wald and F. Diorico for their help with optical filtering, O. Hosten\r\nand M. Aspelmeyer for equipment, H.G.L. Schwefel for materials and discussions, L.\r\nDrmic and P. Zielinski for software support, and the MIBA workshop at IST Austria for\r\nmachining the microwave cavity. This work was supported by the European Research\r\nCouncil under grant agreement no. 758053 (ERC StG QUNNECT) and the European\r\nUnion’s Horizon 2020 research and innovation program under grant agreement no.\r\n899354 (FETopen SuperQuLAN). W.H. is the recipient of an ISTplus postdoctoral fellowship\r\nwith funding from the European Union’s Horizon 2020 research and innovation\r\nprogram under the Marie Skłodowska-Curie grant agreement no. 754411. G.A. is the\r\nrecipient of a DOC fellowship of the Austrian Academy of Sciences at IST Austria. J.M.F.\r\nacknowledges support from the Austrian Science Fund (FWF) through BeyondC (F7105)\r\nand the European Union’s Horizon 2020 research and innovation programs under grant\r\nagreement no. 862644 (FETopen QUARTET).","date_published":"2022-03-11T00:00:00Z","project":[{"_id":"26336814-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"A Fiber Optic Transceiver for Superconducting Qubits","grant_number":"758053"},{"_id":"9B868D20-BA93-11EA-9121-9846C619BF3A","call_identifier":"H2020","name":"Quantum Local Area Networks with Superconducting Qubits","grant_number":"899354"},{"_id":"260C2330-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"754411","name":"ISTplus - Postdoctoral Fellowships"},{"_id":"26927A52-B435-11E9-9278-68D0E5697425","grant_number":"F07105","name":"Integrating superconducting quantum circuits","call_identifier":"FWF"},{"_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E","call_identifier":"H2020","grant_number":"862644","name":"Quantum readout techniques and technologies"}],"status":"public","publication":"Nature Communications","volume":13,"article_type":"original","date_created":"2022-03-27T22:01:45Z","author":[{"first_name":"Rishabh","orcid":"0000-0001-6264-2162","last_name":"Sahu","full_name":"Sahu, Rishabh","id":"47D26E34-F248-11E8-B48F-1D18A9856A87"},{"orcid":"0000-0001-9868-2166","first_name":"William J","id":"29705398-F248-11E8-B48F-1D18A9856A87","full_name":"Hease, William J","last_name":"Hease"},{"orcid":"0000-0001-6249-5860","first_name":"Alfredo R","full_name":"Rueda Sanchez, Alfredo R","id":"3B82B0F8-F248-11E8-B48F-1D18A9856A87","last_name":"Rueda Sanchez"},{"orcid":"0000-0003-1397-7876","first_name":"Georg M","last_name":"Arnold","id":"3770C838-F248-11E8-B48F-1D18A9856A87","full_name":"Arnold, Georg M"},{"full_name":"Qiu, Liu","id":"45e99c0d-1eb1-11eb-9b96-ed8ab2983cac","last_name":"Qiu","first_name":"Liu","orcid":"0000-0003-4345-4267"},{"full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","last_name":"Fink","first_name":"Johannes M","orcid":"0000-0001-8112-028X"}],"day":"11","scopus_import":"1","oa_version":"Published Version","title":"Quantum-enabled operation of a microwave-optical interface","publication_status":"published","publication_identifier":{"eissn":["20411723"]},"file_date_updated":"2022-03-28T08:02:12Z","has_accepted_license":"1","abstract":[{"text":"Solid-state microwave systems offer strong interactions for fast quantum logic and sensing but photons at telecom wavelength are the ideal choice for high-density low-loss quantum interconnects. A general-purpose interface that can make use of single photon effects requires < 1 input noise quanta, which has remained elusive due to either low efficiency or pump induced heating. Here we demonstrate coherent electro-optic modulation on nanosecond-timescales with only 0.16+0.02−0.01 microwave input noise photons with a total bidirectional transduction efficiency of 8.7% (or up to 15% with 0.41+0.02−0.02), as required for near-term heralded quantum network protocols. The use of short and high-power optical pump pulses also enables near-unity cooperativity of the electro-optic interaction leading to an internal pure conversion efficiency of up to 99.5%. Together with the low mode occupancy this provides evidence for electro-optic laser cooling and vacuum amplification as predicted a decade ago.","lang":"eng"}],"tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"intvolume":"        13","acknowledged_ssus":[{"_id":"M-Shop"}],"department":[{"_id":"JoFi"}],"article_number":"1276","file":[{"file_id":"10929","creator":"dernst","date_updated":"2022-03-28T08:02:12Z","file_size":1167492,"date_created":"2022-03-28T08:02:12Z","checksum":"7c5176db7b8e2ed18a4e0c5aca70a72c","relation":"main_file","content_type":"application/pdf","access_level":"open_access","file_name":"2022_NatureCommunications_Sahu.pdf","success":1}],"arxiv":1,"month":"03","citation":{"ista":"Sahu R, Hease WJ, Rueda Sanchez AR, Arnold GM, Qiu L, Fink JM. 2022. Quantum-enabled operation of a microwave-optical interface. Nature Communications. 13, 1276.","chicago":"Sahu, Rishabh, William J Hease, Alfredo R Rueda Sanchez, Georg M Arnold, Liu Qiu, and Johannes M Fink. “Quantum-Enabled Operation of a Microwave-Optical Interface.” <i>Nature Communications</i>. Springer Nature, 2022. <a href=\"https://doi.org/10.1038/s41467-022-28924-2\">https://doi.org/10.1038/s41467-022-28924-2</a>.","mla":"Sahu, Rishabh, et al. “Quantum-Enabled Operation of a Microwave-Optical Interface.” <i>Nature Communications</i>, vol. 13, 1276, Springer Nature, 2022, doi:<a href=\"https://doi.org/10.1038/s41467-022-28924-2\">10.1038/s41467-022-28924-2</a>.","apa":"Sahu, R., Hease, W. J., Rueda Sanchez, A. R., Arnold, G. M., Qiu, L., &#38; Fink, J. M. (2022). Quantum-enabled operation of a microwave-optical interface. <i>Nature Communications</i>. Springer Nature. <a href=\"https://doi.org/10.1038/s41467-022-28924-2\">https://doi.org/10.1038/s41467-022-28924-2</a>","ama":"Sahu R, Hease WJ, Rueda Sanchez AR, Arnold GM, Qiu L, Fink JM. Quantum-enabled operation of a microwave-optical interface. <i>Nature Communications</i>. 2022;13. doi:<a href=\"https://doi.org/10.1038/s41467-022-28924-2\">10.1038/s41467-022-28924-2</a>","short":"R. Sahu, W.J. Hease, A.R. Rueda Sanchez, G.M. Arnold, L. Qiu, J.M. Fink, Nature Communications 13 (2022).","ieee":"R. Sahu, W. J. Hease, A. R. Rueda Sanchez, G. M. Arnold, L. Qiu, and J. M. Fink, “Quantum-enabled operation of a microwave-optical interface,” <i>Nature Communications</i>, vol. 13. Springer Nature, 2022."},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","oa":1,"language":[{"iso":"eng"}]},{"isi":1,"year":"2022","external_id":{"arxiv":["2111.01115"],"isi":["000770371400003"]},"publication":"Physical Review Applied","status":"public","acknowledgement":"We would like to thank Ida Milow for her internship in the laboratory and contributions to our code base. We thank T. Zent and L. Hamdan for technical assistance, and D. Fan for help with setting up the aluminum evaporator. We thank A. Salari, M. Rößler, S. Barzanjeh, M. Zemlicka, F. Hassani, and M. Peruzzo for contributions in the early stages of the experiments. This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 741121) and was also funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under CRC 1238 – 277146847 (Subproject B01), as well as under Germany’s Excellence Strategy – Cluster of Excellence Matter and Light for Quantum Computing (ML4Q), EXC 2004/1\r\n– 390534769.","date_published":"2022-03-11T00:00:00Z","doi":"10.1103/PhysRevApplied.17.034032","article_processing_charge":"No","publisher":"American Physical Society","date_updated":"2023-08-03T06:23:58Z","_id":"10940","type":"journal_article","main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2111.01115","open_access":"1"}],"quality_controlled":"1","arxiv":1,"month":"03","department":[{"_id":"JoFi"}],"article_number":"034032","oa":1,"language":[{"iso":"eng"}],"issue":"3","citation":{"short":"J. Krause, C. Dickel, E. Vaal, M. Vielmetter, J. Feng, R. Bounds, G. Catelani, J.M. Fink, Y. Ando, Physical Review Applied 17 (2022).","ieee":"J. Krause <i>et al.</i>, “Magnetic field resilience of three-dimensional transmons with thin-film Al/AlOx/Al Josephson junctions approaching 1 T,” <i>Physical Review Applied</i>, vol. 17, no. 3. American Physical Society, 2022.","ama":"Krause J, Dickel C, Vaal E, et al. Magnetic field resilience of three-dimensional transmons with thin-film Al/AlOx/Al Josephson junctions approaching 1 T. <i>Physical Review Applied</i>. 2022;17(3). doi:<a href=\"https://doi.org/10.1103/PhysRevApplied.17.034032\">10.1103/PhysRevApplied.17.034032</a>","mla":"Krause, J., et al. “Magnetic Field Resilience of Three-Dimensional Transmons with Thin-Film Al/AlOx/Al Josephson Junctions Approaching 1 T.” <i>Physical Review Applied</i>, vol. 17, no. 3, 034032, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/PhysRevApplied.17.034032\">10.1103/PhysRevApplied.17.034032</a>.","apa":"Krause, J., Dickel, C., Vaal, E., Vielmetter, M., Feng, J., Bounds, R., … Ando, Y. (2022). Magnetic field resilience of three-dimensional transmons with thin-film Al/AlOx/Al Josephson junctions approaching 1 T. <i>Physical Review Applied</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevApplied.17.034032\">https://doi.org/10.1103/PhysRevApplied.17.034032</a>","chicago":"Krause, J., C. Dickel, E. Vaal, M. Vielmetter, J. Feng, R. Bounds, G. Catelani, Johannes M Fink, and Yoichi Ando. “Magnetic Field Resilience of Three-Dimensional Transmons with Thin-Film Al/AlOx/Al Josephson Junctions Approaching 1 T.” <i>Physical Review Applied</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/PhysRevApplied.17.034032\">https://doi.org/10.1103/PhysRevApplied.17.034032</a>.","ista":"Krause J, Dickel C, Vaal E, Vielmetter M, Feng J, Bounds R, Catelani G, Fink JM, Ando Y. 2022. Magnetic field resilience of three-dimensional transmons with thin-film Al/AlOx/Al Josephson junctions approaching 1 T. Physical Review Applied. 17(3), 034032."},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","author":[{"full_name":"Krause, J.","last_name":"Krause","first_name":"J."},{"last_name":"Dickel","full_name":"Dickel, C.","first_name":"C."},{"first_name":"E.","last_name":"Vaal","full_name":"Vaal, E."},{"full_name":"Vielmetter, M.","last_name":"Vielmetter","first_name":"M."},{"first_name":"J.","full_name":"Feng, J.","last_name":"Feng"},{"first_name":"R.","last_name":"Bounds","full_name":"Bounds, R."},{"last_name":"Catelani","full_name":"Catelani, G.","first_name":"G."},{"last_name":"Fink","full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8112-028X","first_name":"Johannes M"},{"full_name":"Ando, Yoichi","last_name":"Ando","first_name":"Yoichi"}],"scopus_import":"1","day":"11","title":"Magnetic field resilience of three-dimensional transmons with thin-film Al/AlOx/Al Josephson junctions approaching 1 T","oa_version":"Preprint","volume":17,"article_type":"original","date_created":"2022-04-03T22:01:43Z","intvolume":"        17","abstract":[{"text":"Magnetic-field-resilient superconducting circuits enable sensing applications and hybrid quantum computing architectures involving spin or topological qubits and electromechanical elements, as well as studying flux noise and quasiparticle loss. We investigate the effect of in-plane magnetic fields up to 1 T on the spectrum and coherence times of thin-film three-dimensional aluminum transmons. Using a copper cavity, unaffected by strong magnetic fields, we can probe solely the effect of magnetic fields on the transmons. We present data on a single-junction and a superconducting-quantum-interference-device (SQUID) transmon that are cooled down in the same cavity. As expected, the transmon frequencies decrease with increasing field, due to suppression of the superconducting gap and a geometric Fraunhofer-like contribution. Nevertheless, the thin-film transmons show strong magnetic field resilience: both transmons display microsecond coherence up to at least 0.65 T, and T1 remains above 1μs over the entire measurable range. SQUID spectroscopy is feasible up to 1 T, the limit of our magnet. We conclude that thin-film aluminum Josephson junctions are suitable hardware for superconducting circuits in the high-magnetic-field regime.","lang":"eng"}],"publication_status":"published","publication_identifier":{"eissn":["2331-7019"]}},{"publication_identifier":{"issn":["0003-6951"]},"publication_status":"published","intvolume":"       120","abstract":[{"text":"Over the past few years, the field of quantum information science has seen tremendous progress toward realizing large-scale quantum computers. With demonstrations of quantum computers outperforming classical computers for a select range of problems,1–3 we have finally entered the noisy, intermediate-scale quantum (NISQ) computing era. While the quantum computers of today are technological marvels, they are not yet error corrected, and it is unclear whether any system will scale beyond a few hundred logical qubits without significant changes to architecture and control schemes. Today's quantum systems are analogous to the ENIAC (Electronic Numerical Integrator And Computer) and EDVAC (Electronic Discrete Variable Automatic Computer) systems of the 1940s, which ran on vacuum tubes. These machines were built on a solid, nominally scalable architecture and when they were developed, nobody could have predicted the development of the transistor and the impact of the resulting semiconductor industry. Simply put, the computers of today are nothing like the early computers of the 1940s. We believe that the qubits of future fault-tolerant quantum systems will look quite different from the qubits of the NISQ machines in operation today. This Special Topic issue is devoted to new and emerging quantum systems with a focus on enabling technologies that can eventually lead to the quantum analog to the transistor. We have solicited both research4–18 and perspective articles19–21 to discuss new and emerging qubit systems with a focus on novel materials, encodings, and architectures. We are proud to present a collection that touches on a wide range of technologies including superconductors,7–13,21 semiconductors,15–17,19 and individual atomic qubits.18\r\n","lang":"eng"}],"volume":120,"article_type":"letter_note","date_created":"2022-05-29T22:01:53Z","author":[{"last_name":"Sigillito","full_name":"Sigillito, Anthony J.","first_name":"Anthony J."},{"last_name":"Covey","full_name":"Covey, Jacob P.","first_name":"Jacob P."},{"full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","last_name":"Fink","orcid":"0000-0001-8112-028X","first_name":"Johannes M"},{"full_name":"Petersson, Karl","last_name":"Petersson","first_name":"Karl"},{"last_name":"Preble","full_name":"Preble, Stefan","first_name":"Stefan"}],"day":"12","scopus_import":"1","title":"Emerging qubit systems: Guest editorial","oa_version":"Published Version","issue":"19","citation":{"mla":"Sigillito, Anthony J., et al. “Emerging Qubit Systems: Guest Editorial.” <i>Applied Physics Letters</i>, vol. 120, no. 19, 190401, American Institute of Physics, 2022, doi:<a href=\"https://doi.org/10.1063/5.0097339\">10.1063/5.0097339</a>.","apa":"Sigillito, A. J., Covey, J. P., Fink, J. M., Petersson, K., &#38; Preble, S. (2022). Emerging qubit systems: Guest editorial. <i>Applied Physics Letters</i>. American Institute of Physics. <a href=\"https://doi.org/10.1063/5.0097339\">https://doi.org/10.1063/5.0097339</a>","chicago":"Sigillito, Anthony J., Jacob P. Covey, Johannes M Fink, Karl Petersson, and Stefan Preble. “Emerging Qubit Systems: Guest Editorial.” <i>Applied Physics Letters</i>. American Institute of Physics, 2022. <a href=\"https://doi.org/10.1063/5.0097339\">https://doi.org/10.1063/5.0097339</a>.","ista":"Sigillito AJ, Covey JP, Fink JM, Petersson K, Preble S. 2022. Emerging qubit systems: Guest editorial. Applied Physics Letters. 120(19), 190401.","short":"A.J. Sigillito, J.P. Covey, J.M. Fink, K. Petersson, S. Preble, Applied Physics Letters 120 (2022).","ieee":"A. J. Sigillito, J. P. Covey, J. M. Fink, K. Petersson, and S. Preble, “Emerging qubit systems: Guest editorial,” <i>Applied Physics Letters</i>, vol. 120, no. 19. American Institute of Physics, 2022.","ama":"Sigillito AJ, Covey JP, Fink JM, Petersson K, Preble S. Emerging qubit systems: Guest editorial. <i>Applied Physics Letters</i>. 2022;120(19). doi:<a href=\"https://doi.org/10.1063/5.0097339\">10.1063/5.0097339</a>"},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","oa":1,"language":[{"iso":"eng"}],"department":[{"_id":"JoFi"}],"article_number":"190401","month":"05","main_file_link":[{"url":"https://doi.org/10.1063/5.0097339","open_access":"1"}],"quality_controlled":"1","date_updated":"2023-08-03T07:16:20Z","_id":"11417","type":"journal_article","doi":"10.1063/5.0097339","article_processing_charge":"No","publisher":"American Institute of Physics","acknowledgement":"We would like to thank all of the authors who contributed to\r\nthis Special Topic. We would also like to thank the editorial team at\r\nAPL including Jessica Trudeau, Emma Van Burns, Martin Weides,\r\nand Lesley Cohen.","date_published":"2022-05-12T00:00:00Z","status":"public","publication":"Applied Physics Letters","year":"2022","isi":1,"external_id":{"isi":["000796002100002"]}},{"publication_status":"published","publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"abstract":[{"text":"We investigate the deterministic generation and distribution of entanglement in large quantum networks by driving distant qubits with the output fields of a nondegenerate parametric amplifier. In this setting, the amplifier produces a continuous Gaussian two-mode squeezed state, which acts as a quantum-correlated reservoir for the qubits and relaxes them into a highly entangled steady state. Here we are interested in the maximal amount of entanglement and the optimal entanglement generation rates that can be achieved with this scheme under realistic conditions taking, in particular, the finite amplifier bandwidth, waveguide losses, and propagation delays into account. By combining exact numerical simulations of the full network with approximate analytic results, we predict the optimal working point for the amplifier and the corresponding qubit-qubit entanglement under various conditions. Our findings show that this passive conversion of Gaussian into discrete-variable entanglement offers a robust and experimentally very attractive approach for operating large optical, microwave, or hybrid quantum networks, for which efficient parametric amplifiers are currently developed.","lang":"eng"}],"intvolume":"       105","article_type":"original","date_created":"2022-07-17T22:01:55Z","volume":105,"title":"Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams","oa_version":"Preprint","author":[{"first_name":"J.","full_name":"Agustí, J.","last_name":"Agustí"},{"first_name":"Y.","full_name":"Minoguchi, Y.","last_name":"Minoguchi"},{"last_name":"Fink","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M","orcid":"0000-0001-8112-028X","first_name":"Johannes M"},{"last_name":"Rabl","full_name":"Rabl, P.","first_name":"P."}],"scopus_import":"1","day":"29","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","issue":"6","citation":{"ama":"Agustí J, Minoguchi Y, Fink JM, Rabl P. Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams. <i>Physical Review A</i>. 2022;105(6). doi:<a href=\"https://doi.org/10.1103/PhysRevA.105.062454\">10.1103/PhysRevA.105.062454</a>","ieee":"J. Agustí, Y. Minoguchi, J. M. Fink, and P. Rabl, “Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams,” <i>Physical Review A</i>, vol. 105, no. 6. American Physical Society, 2022.","short":"J. Agustí, Y. Minoguchi, J.M. Fink, P. Rabl, Physical Review A 105 (2022).","ista":"Agustí J, Minoguchi Y, Fink JM, Rabl P. 2022. Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams. Physical Review A. 105(6), 062454.","chicago":"Agustí, J., Y. Minoguchi, Johannes M Fink, and P. Rabl. “Long-Distance Distribution of Qubit-Qubit Entanglement Using Gaussian-Correlated Photonic Beams.” <i>Physical Review A</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/PhysRevA.105.062454\">https://doi.org/10.1103/PhysRevA.105.062454</a>.","apa":"Agustí, J., Minoguchi, Y., Fink, J. M., &#38; Rabl, P. (2022). Long-distance distribution of qubit-qubit entanglement using Gaussian-correlated photonic beams. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.105.062454\">https://doi.org/10.1103/PhysRevA.105.062454</a>","mla":"Agustí, J., et al. “Long-Distance Distribution of Qubit-Qubit Entanglement Using Gaussian-Correlated Photonic Beams.” <i>Physical Review A</i>, vol. 105, no. 6, 062454, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/PhysRevA.105.062454\">10.1103/PhysRevA.105.062454</a>."},"language":[{"iso":"eng"}],"oa":1,"article_number":"062454","department":[{"_id":"JoFi"}],"arxiv":1,"month":"06","quality_controlled":"1","main_file_link":[{"url":" https://doi.org/10.48550/arXiv.2204.02993","open_access":"1"}],"type":"journal_article","date_updated":"2023-08-03T11:58:16Z","_id":"11591","publisher":"American Physical Society","doi":"10.1103/PhysRevA.105.062454","article_processing_charge":"No","acknowledgement":"We thank T. Mavrogordatos and D. Zhu for initial contribution on the presented topic and K. Fedorov for stimulating discussions on entangled microwave beams. This work was supported by the Austrian Science Fund (FWF) through Grant No. P32299 (PHONED) and the European Union’s Horizon 2020 research and innovation programme under Grant Agreement No. 899354 (SuperQuLAN). Most of the computational results presented were obtained using the CLIP cluster [65].","date_published":"2022-06-29T00:00:00Z","ec_funded":1,"project":[{"_id":"9B868D20-BA93-11EA-9121-9846C619BF3A","name":"Quantum Local Area Networks with Superconducting Qubits","grant_number":"899354","call_identifier":"H2020"}],"status":"public","publication":"Physical Review A","external_id":{"arxiv":["2204.02993"],"isi":["000824330200003"]},"isi":1,"year":"2022"},{"article_processing_charge":"No","day":"28","author":[{"first_name":"Martin","full_name":"Zemlicka, Martin","id":"2DCF8DE6-F248-11E8-B48F-1D18A9856A87","last_name":"Zemlicka"},{"full_name":"Redchenko, Elena","id":"2C21D6E8-F248-11E8-B48F-1D18A9856A87","last_name":"Redchenko","first_name":"Elena"},{"first_name":"Matilda","orcid":"0000-0002-3415-4628","full_name":"Peruzzo, Matilda","id":"3F920B30-F248-11E8-B48F-1D18A9856A87","last_name":"Peruzzo"},{"first_name":"Farid","orcid":"0000-0001-6937-5773","full_name":"Hassani, Farid","id":"2AED110C-F248-11E8-B48F-1D18A9856A87","last_name":"Hassani"},{"first_name":"Andrea","last_name":"Trioni","full_name":"Trioni, Andrea","id":"42F71B44-F248-11E8-B48F-1D18A9856A87"},{"orcid":"0000-0003-0415-1423","first_name":"Shabir","last_name":"Barzanjeh","id":"2D25E1F6-F248-11E8-B48F-1D18A9856A87","full_name":"Barzanjeh, Shabir"},{"first_name":"Johannes M","orcid":"0000-0001-8112-028X","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M","last_name":"Fink"}],"doi":"10.5281/ZENODO.8408897","title":"Compact vacuum gap transmon qubits: Selective and sensitive probes for superconductor surface losses","oa_version":"Published Version","publisher":"Zenodo","_id":"14520","date_updated":"2024-09-10T12:23:57Z","date_created":"2023-11-13T08:09:10Z","type":"research_data_reference","has_accepted_license":"1","ddc":["530"],"tmp":{"name":"Creative Commons Public Domain Dedication (CC0 1.0)","legal_code_url":"https://creativecommons.org/publicdomain/zero/1.0/legalcode","image":"/images/cc_0.png","short":"CC0 (1.0)"},"abstract":[{"text":"This dataset comprises all data shown in the figures of the submitted article \"Compact vacuum gap transmon qubits: Selective and sensitive probes for superconductor surface losses\" at arxiv.org/abs/2206.14104. Additional raw data are available from the corresponding author on reasonable request.","lang":"eng"}],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.5281/ZENODO.8408897"}],"year":"2022","month":"06","related_material":{"record":[{"relation":"used_in_publication","status":"public","id":"14517"}]},"department":[{"_id":"JoFi"}],"oa":1,"status":"public","citation":{"apa":"Zemlicka, M., Redchenko, E., Peruzzo, M., Hassani, F., Trioni, A., Barzanjeh, S., &#38; Fink, J. M. (2022). Compact vacuum gap transmon qubits: Selective and sensitive probes for superconductor surface losses. Zenodo. <a href=\"https://doi.org/10.5281/ZENODO.8408897\">https://doi.org/10.5281/ZENODO.8408897</a>","mla":"Zemlicka, Martin, et al. <i>Compact Vacuum Gap Transmon Qubits: Selective and Sensitive Probes for Superconductor Surface Losses</i>. Zenodo, 2022, doi:<a href=\"https://doi.org/10.5281/ZENODO.8408897\">10.5281/ZENODO.8408897</a>.","ista":"Zemlicka M, Redchenko E, Peruzzo M, Hassani F, Trioni A, Barzanjeh S, Fink JM. 2022. Compact vacuum gap transmon qubits: Selective and sensitive probes for superconductor surface losses, Zenodo, <a href=\"https://doi.org/10.5281/ZENODO.8408897\">10.5281/ZENODO.8408897</a>.","chicago":"Zemlicka, Martin, Elena Redchenko, Matilda Peruzzo, Farid Hassani, Andrea Trioni, Shabir Barzanjeh, and Johannes M Fink. “Compact Vacuum Gap Transmon Qubits: Selective and Sensitive Probes for Superconductor Surface Losses.” Zenodo, 2022. <a href=\"https://doi.org/10.5281/ZENODO.8408897\">https://doi.org/10.5281/ZENODO.8408897</a>.","ieee":"M. Zemlicka <i>et al.</i>, “Compact vacuum gap transmon qubits: Selective and sensitive probes for superconductor surface losses.” Zenodo, 2022.","short":"M. Zemlicka, E. Redchenko, M. Peruzzo, F. Hassani, A. Trioni, S. Barzanjeh, J.M. Fink, (2022).","ama":"Zemlicka M, Redchenko E, Peruzzo M, et al. Compact vacuum gap transmon qubits: Selective and sensitive probes for superconductor surface losses. 2022. doi:<a href=\"https://doi.org/10.5281/ZENODO.8408897\">10.5281/ZENODO.8408897</a>"},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","date_published":"2022-06-28T00:00:00Z"},{"date_published":"2022-05-01T00:00:00Z","conference":{"location":"San Jose, CA, United States","start_date":"2022-05-15","end_date":"2022-05-20","name":"CLEO: QELS Fundamental Science"},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","citation":{"short":"R. Sahu, W.J. Hease, A.R. Rueda Sanchez, G.M. Arnold, L. Qiu, J.M. Fink, in:, Conference on Lasers and Electro-Optics, Optica Publishing Group, 2022.","ieee":"R. Sahu, W. J. Hease, A. R. Rueda Sanchez, G. M. Arnold, L. Qiu, and J. M. Fink, “Realizing a quantum-enabled interconnect between microwave and telecom light,” in <i>Conference on Lasers and Electro-Optics</i>, San Jose, CA, United States, 2022.","ama":"Sahu R, Hease WJ, Rueda Sanchez AR, Arnold GM, Qiu L, Fink JM. Realizing a quantum-enabled interconnect between microwave and telecom light. In: <i>Conference on Lasers and Electro-Optics</i>. Optica Publishing Group; 2022. doi:<a href=\"https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4\">10.1364/CLEO_QELS.2022.FW4D.4</a>","mla":"Sahu, Rishabh, et al. “Realizing a Quantum-Enabled Interconnect between Microwave and Telecom Light.” <i>Conference on Lasers and Electro-Optics</i>, FW4D.4, Optica Publishing Group, 2022, doi:<a href=\"https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4\">10.1364/CLEO_QELS.2022.FW4D.4</a>.","apa":"Sahu, R., Hease, W. J., Rueda Sanchez, A. R., Arnold, G. M., Qiu, L., &#38; Fink, J. M. (2022). Realizing a quantum-enabled interconnect between microwave and telecom light. In <i>Conference on Lasers and Electro-Optics</i>. San Jose, CA, United States: Optica Publishing Group. <a href=\"https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4\">https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4</a>","chicago":"Sahu, Rishabh, William J Hease, Alfredo R Rueda Sanchez, Georg M Arnold, Liu Qiu, and Johannes M Fink. “Realizing a Quantum-Enabled Interconnect between Microwave and Telecom Light.” In <i>Conference on Lasers and Electro-Optics</i>. Optica Publishing Group, 2022. <a href=\"https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4\">https://doi.org/10.1364/CLEO_QELS.2022.FW4D.4</a>.","ista":"Sahu R, Hease WJ, Rueda Sanchez AR, Arnold GM, Qiu L, Fink JM. 2022. Realizing a quantum-enabled interconnect between microwave and telecom light. Conference on Lasers and Electro-Optics. CLEO: QELS Fundamental Science, FW4D.4."},"language":[{"iso":"eng"}],"status":"public","publication":"Conference on Lasers and Electro-Optics","article_number":"FW4D.4","department":[{"_id":"JoFi"}],"month":"05","year":"2022","publication_identifier":{"isbn":["9781557528209"]},"quality_controlled":"1","publication_status":"published","abstract":[{"lang":"eng","text":"We present a quantum-enabled microwave-telecom interface with bidirectional conversion efficiencies up to 15% and added input noise quanta as low as 0.16. Moreover, we observe evidence for electro-optic laser cooling and vacuum amplification."}],"type":"conference","date_created":"2022-09-11T22:01:58Z","date_updated":"2023-02-13T09:06:10Z","_id":"12088","title":"Realizing a quantum-enabled interconnect between microwave and telecom light","publisher":"Optica Publishing Group","oa_version":"None","doi":"10.1364/CLEO_QELS.2022.FW4D.4","author":[{"orcid":"0000-0001-6264-2162","first_name":"Rishabh","last_name":"Sahu","id":"47D26E34-F248-11E8-B48F-1D18A9856A87","full_name":"Sahu, Rishabh"},{"first_name":"William J","last_name":"Hease","id":"29705398-F248-11E8-B48F-1D18A9856A87","full_name":"Hease, William J"},{"orcid":"0000-0001-6249-5860","first_name":"Alfredo R","last_name":"Rueda Sanchez","full_name":"Rueda Sanchez, Alfredo R","id":"3B82B0F8-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Georg M","full_name":"Arnold, Georg M","id":"3770C838-F248-11E8-B48F-1D18A9856A87","last_name":"Arnold"},{"first_name":"Liu","orcid":"0000-0003-4345-4267","full_name":"Qiu, Liu","id":"45e99c0d-1eb1-11eb-9b96-ed8ab2983cac","last_name":"Qiu"},{"last_name":"Fink","full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","first_name":"Johannes M","orcid":"0000-0001-8112-028X"}],"day":"01","article_processing_charge":"No","scopus_import":"1"},{"date_published":"2021-10-22T00:00:00Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","citation":{"ama":"Peruzzo M, Hassani F, Szep G, et al. Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction. 2021. doi:<a href=\"https://doi.org/10.5281/ZENODO.5592103\">10.5281/ZENODO.5592103</a>","ieee":"M. Peruzzo <i>et al.</i>, “Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction.” Zenodo, 2021.","short":"M. Peruzzo, F. Hassani, G. Szep, A. Trioni, E. Redchenko, M. Zemlicka, J.M. Fink, (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, Zenodo, <a href=\"https://doi.org/10.5281/ZENODO.5592103\">10.5281/ZENODO.5592103</a>.","chicago":"Peruzzo, Matilda, Farid Hassani, Grisha Szep, Andrea Trioni, Elena Redchenko, Martin Zemlicka, and Johannes M Fink. “Geometric Superinductance Qubits: Controlling Phase Delocalization across a Single Josephson Junction.” Zenodo, 2021. <a href=\"https://doi.org/10.5281/ZENODO.5592103\">https://doi.org/10.5281/ZENODO.5592103</a>.","apa":"Peruzzo, M., Hassani, F., Szep, G., Trioni, A., Redchenko, E., Zemlicka, M., &#38; Fink, J. M. (2021). Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction. Zenodo. <a href=\"https://doi.org/10.5281/ZENODO.5592103\">https://doi.org/10.5281/ZENODO.5592103</a>","mla":"Peruzzo, Matilda, et al. <i>Geometric Superinductance Qubits: Controlling Phase Delocalization across a Single Josephson Junction</i>. Zenodo, 2021, doi:<a href=\"https://doi.org/10.5281/ZENODO.5592103\">10.5281/ZENODO.5592103</a>."},"status":"public","oa":1,"department":[{"_id":"JoFi"}],"related_material":{"record":[{"relation":"used_in_publication","status":"public","id":"9928"}]},"month":"10","year":"2021","main_file_link":[{"url":"https://doi.org/10.5281/zenodo.5592104","open_access":"1"}],"abstract":[{"lang":"eng","text":"This dataset comprises all data shown in the figures of the submitted article \"Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction\". Additional raw data are available from the corresponding author on reasonable request."}],"tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"ddc":["530"],"type":"research_data_reference","date_created":"2023-05-23T13:42:27Z","date_updated":"2023-08-11T10:44:21Z","_id":"13057","title":"Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction","oa_version":"Published Version","publisher":"Zenodo","doi":"10.5281/ZENODO.5592103","author":[{"id":"3F920B30-F248-11E8-B48F-1D18A9856A87","full_name":"Peruzzo, Matilda","last_name":"Peruzzo","orcid":"0000-0002-3415-4628","first_name":"Matilda"},{"orcid":"0000-0001-6937-5773","first_name":"Farid","full_name":"Hassani, Farid","id":"2AED110C-F248-11E8-B48F-1D18A9856A87","last_name":"Hassani"},{"last_name":"Szep","full_name":"Szep, Grisha","first_name":"Grisha"},{"first_name":"Andrea","full_name":"Trioni, Andrea","id":"42F71B44-F248-11E8-B48F-1D18A9856A87","last_name":"Trioni"},{"first_name":"Elena","id":"2C21D6E8-F248-11E8-B48F-1D18A9856A87","full_name":"Redchenko, Elena","last_name":"Redchenko"},{"first_name":"Martin","full_name":"Zemlicka, Martin","id":"2DCF8DE6-F248-11E8-B48F-1D18A9856A87","last_name":"Zemlicka"},{"first_name":"Johannes M","orcid":"0000-0001-8112-028X","last_name":"Fink","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M"}],"article_processing_charge":"No","day":"22"},{"quality_controlled":"1","publication_status":"published","main_file_link":[{"url":"https://bluefors.com/blog/integrated-quantum-measurement-system/","open_access":"1"}],"abstract":[{"lang":"eng","text":"The purpose of this application note is to demonstrate a working example of a superconducting qubit measurement in a Bluefors cryostat using the Keysight quantum control hardware. Our motivation is twofold. First, we provide pre-qualification data that the Bluefors cryostat, including filtering and wiring, can support long-lived qubits. Second, we demonstrate that the Keysight system (controlled using Labber) provides a straightforward solution to perform these characterization measurements. This document is intended as a brief guide for starting an experimental platform for testing superconducting qubits. The setup described here is an immediate jumping off point for a suite of applications including testing quantum logical gates, quantum optics with microwaves, or even using the qubit itself as a sensitive probe of local electromagnetic fields. Qubit measurements rely on high performance of both the physical sample environment and the measurement electronics. An overview of the cryogenic system is shown in Figure 1, and an overview of the integration between the electronics and cryostat (including wiring details) is shown in Figure 2."}],"page":"9","type":"other_academic_publication","date_created":"2022-01-19T08:29:57Z","date_updated":"2022-01-19T09:11:33Z","_id":"10644","title":"The Bluefors dilution refrigerator as an integrated quantum measurement system","publisher":"Bluefors Oy","oa_version":"Published Version","author":[{"last_name":"Lake","full_name":"Lake, Russell","first_name":"Russell"},{"first_name":"Slawomir","last_name":"Simbierowicz","full_name":"Simbierowicz, Slawomir"},{"last_name":"Krantz","full_name":"Krantz, Philip","first_name":"Philip"},{"first_name":"Farid","last_name":"Hassani","full_name":"Hassani, Farid","id":"2AED110C-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Fink","full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","first_name":"Johannes M","orcid":"0000-0001-8112-028X"}],"day":"20","article_processing_charge":"No","alternative_title":["Bluefors Blog"],"date_published":"2021-04-20T00:00:00Z","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","place":"Helsinki, Finland","citation":{"ista":"Lake R, Simbierowicz S, Krantz P, Hassani F, Fink JM. 2021. The Bluefors dilution refrigerator as an integrated quantum measurement system, Helsinki, Finland: Bluefors Oy, 9p.","chicago":"Lake, Russell, Slawomir Simbierowicz, Philip Krantz, Farid Hassani, and Johannes M Fink. <i>The Bluefors Dilution Refrigerator as an Integrated Quantum Measurement System</i>. Helsinki, Finland: Bluefors Oy, 2021.","apa":"Lake, R., Simbierowicz, S., Krantz, P., Hassani, F., &#38; Fink, J. M. (2021). <i>The Bluefors dilution refrigerator as an integrated quantum measurement system</i>. Helsinki, Finland: Bluefors Oy.","mla":"Lake, Russell, et al. <i>The Bluefors Dilution Refrigerator as an Integrated Quantum Measurement System</i>. Bluefors Oy, 2021.","ama":"Lake R, Simbierowicz S, Krantz P, Hassani F, Fink JM. <i>The Bluefors Dilution Refrigerator as an Integrated Quantum Measurement System</i>. Helsinki, Finland: Bluefors Oy; 2021.","ieee":"R. Lake, S. Simbierowicz, P. Krantz, F. Hassani, and J. M. Fink, <i>The Bluefors dilution refrigerator as an integrated quantum measurement system</i>. Helsinki, Finland: Bluefors Oy, 2021.","short":"R. Lake, S. Simbierowicz, P. Krantz, F. Hassani, J.M. Fink, The Bluefors Dilution Refrigerator as an Integrated Quantum Measurement System, Bluefors Oy, Helsinki, Finland, 2021."},"language":[{"iso":"eng"}],"status":"public","oa":1,"keyword":["Application note"],"department":[{"_id":"JoFi"}],"month":"04","year":"2021"},{"abstract":[{"text":"Superconducting qubits have emerged as a highly versatile and useful platform for quantum technological applications [1]. Bluefors and Zurich Instruments have supported the growth of this field from the 2010s onwards by providing well-engineered and reliable measurement infrastructure [2]– [6]. Having a long and stable qubit lifetime is a critical system property. Therefore, considerable effort has already gone into measuring qubit energy-relaxation timescales and their fluctuations, see Refs. [7]–[10] among others. Accurately extracting the statistics of a quantum device requires users to perform time consuming measurements. One measurement challenge is that the detection of the state-dependent\r\nresponse of a superconducting resonator due to a dispersively-coupled qubit requires an inherently low signal level. Consequently, measurements must be performed using a microwave probe that contains only a few microwave photons. Improving the signal-to-noise ratio (SNR) by using near-quantum limited parametric amplifiers as well as the use of optimized signal processing enabled by efficient room temperature instrumentation help to reduce measurement time. An empirical observation for fixed frequency transmons from recent literature is that as the energy-relaxation time 𝑇𝑇1 increases, so do its natural temporal fluctuations [7], [10]. This necessitates many repeated measurements to understand the statistics (see for example, Ref. [10]). In addition, as state-of-the-art qubits increase in lifetime, longer\r\nmeasurement times are expected to obtain accurate statistics. As described below, the scaling of the widths of the qubit energy-relaxation distributions also reveal clues about the origin of the energy-relaxation.","lang":"eng"}],"page":"8","publication_status":"published","quality_controlled":"1","main_file_link":[{"url":"https://bluefors.com/blog/application-note-qubit-energy-relaxation-statistics-bluefors-quantum-measurement-system/","open_access":"1"}],"title":"Qubit energy-relaxation statistics in the Bluefors quantum measurement system","publisher":"Bluefors Oy","oa_version":"Published Version","author":[{"first_name":"Slawomir","full_name":"Simbierowicz, Slawomir","last_name":"Simbierowicz"},{"first_name":"Chunyan","full_name":"Shi, Chunyan","last_name":"Shi"},{"full_name":"Collodo, Michele","last_name":"Collodo","first_name":"Michele"},{"last_name":"Kirste","full_name":"Kirste, Moritz","first_name":"Moritz"},{"id":"2AED110C-F248-11E8-B48F-1D18A9856A87","full_name":"Hassani, Farid","last_name":"Hassani","first_name":"Farid"},{"first_name":"Johannes M","orcid":"0000-0001-8112-028X","last_name":"Fink","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M"},{"first_name":"Jonas","full_name":"Bylander, Jonas","last_name":"Bylander"},{"first_name":"Daniel","full_name":"Perez Lozano, Daniel","last_name":"Perez Lozano"},{"full_name":"Lake, Russell","last_name":"Lake","first_name":"Russell"}],"article_processing_charge":"No","alternative_title":["Bluefors Blog"],"day":"03","type":"other_academic_publication","date_created":"2022-01-19T08:41:14Z","date_updated":"2022-01-19T09:11:39Z","_id":"10645","language":[{"iso":"eng"}],"status":"public","oa":1,"date_published":"2021-06-03T00:00:00Z","user_id":"8b945eb4-e2f2-11eb-945a-df72226e66a9","place":"Helsinki, Finland","citation":{"ama":"Simbierowicz S, Shi C, Collodo M, et al. <i>Qubit Energy-Relaxation Statistics in the Bluefors Quantum Measurement System</i>. Helsinki, Finland: Bluefors Oy; 2021.","ieee":"S. Simbierowicz <i>et al.</i>, <i>Qubit energy-relaxation statistics in the Bluefors quantum measurement system</i>. Helsinki, Finland: Bluefors Oy, 2021.","short":"S. Simbierowicz, C. Shi, M. Collodo, M. Kirste, F. Hassani, J.M. Fink, J. Bylander, D. Perez Lozano, R. Lake, Qubit Energy-Relaxation Statistics in the Bluefors Quantum Measurement System, Bluefors Oy, Helsinki, Finland, 2021.","chicago":"Simbierowicz, Slawomir, Chunyan Shi, Michele Collodo, Moritz Kirste, Farid Hassani, Johannes M Fink, Jonas Bylander, Daniel Perez Lozano, and Russell Lake. <i>Qubit Energy-Relaxation Statistics in the Bluefors Quantum Measurement System</i>. Helsinki, Finland: Bluefors Oy, 2021.","ista":"Simbierowicz S, Shi C, Collodo M, Kirste M, Hassani F, Fink JM, Bylander J, Perez Lozano D, Lake R. 2021. Qubit energy-relaxation statistics in the Bluefors quantum measurement system, Helsinki, Finland: Bluefors Oy, 8p.","apa":"Simbierowicz, S., Shi, C., Collodo, M., Kirste, M., Hassani, F., Fink, J. M., … Lake, R. (2021). <i>Qubit energy-relaxation statistics in the Bluefors quantum measurement system</i>. Helsinki, Finland: Bluefors Oy.","mla":"Simbierowicz, Slawomir, et al. <i>Qubit Energy-Relaxation Statistics in the Bluefors Quantum Measurement System</i>. Bluefors Oy, 2021."},"month":"06","year":"2021","keyword":["Application note"],"department":[{"_id":"JoFi"}]},{"department":[{"_id":"JoFi"}],"file":[{"file_id":"9836","creator":"cchlebak","date_updated":"2021-08-09T12:23:13Z","date_created":"2021-08-09T12:23:13Z","file_size":2366118,"checksum":"b15c2c228487a75002c3b52d56f23d5c","relation":"main_file","content_type":"application/pdf","access_level":"open_access","file_name":"2021_QuantumScienceTechnology_Mobassem.pdf"}],"article_number":"045005","arxiv":1,"month":"07","issue":"4","citation":{"ieee":"S. Mobassem, N. J. Lambert, A. R. Rueda Sanchez, J. M. Fink, G. Leuchs, and H. G. L. Schwefel, “Thermal noise in electro-optic devices at cryogenic temperatures,” <i>Quantum Science and Technology</i>, vol. 6, no. 4. IOP Publishing, 2021.","short":"S. Mobassem, N.J. Lambert, A.R. Rueda Sanchez, J.M. Fink, G. Leuchs, H.G.L. Schwefel, Quantum Science and Technology 6 (2021).","ama":"Mobassem S, Lambert NJ, Rueda Sanchez AR, Fink JM, Leuchs G, Schwefel HGL. Thermal noise in electro-optic devices at cryogenic temperatures. <i>Quantum Science and Technology</i>. 2021;6(4). doi:<a href=\"https://doi.org/10.1088/2058-9565/ac0f36\">10.1088/2058-9565/ac0f36</a>","apa":"Mobassem, S., Lambert, N. J., Rueda Sanchez, A. R., Fink, J. M., Leuchs, G., &#38; Schwefel, H. G. L. (2021). Thermal noise in electro-optic devices at cryogenic temperatures. <i>Quantum Science and Technology</i>. IOP Publishing. <a href=\"https://doi.org/10.1088/2058-9565/ac0f36\">https://doi.org/10.1088/2058-9565/ac0f36</a>","mla":"Mobassem, Sonia, et al. “Thermal Noise in Electro-Optic Devices at Cryogenic Temperatures.” <i>Quantum Science and Technology</i>, vol. 6, no. 4, 045005, IOP Publishing, 2021, doi:<a href=\"https://doi.org/10.1088/2058-9565/ac0f36\">10.1088/2058-9565/ac0f36</a>.","chicago":"Mobassem, Sonia, Nicholas J. Lambert, Alfredo R Rueda Sanchez, Johannes M Fink, Gerd Leuchs, and Harald G.L. Schwefel. “Thermal Noise in Electro-Optic Devices at Cryogenic Temperatures.” <i>Quantum Science and Technology</i>. IOP Publishing, 2021. <a href=\"https://doi.org/10.1088/2058-9565/ac0f36\">https://doi.org/10.1088/2058-9565/ac0f36</a>.","ista":"Mobassem S, Lambert NJ, Rueda Sanchez AR, Fink JM, Leuchs G, Schwefel HGL. 2021. Thermal noise in electro-optic devices at cryogenic temperatures. Quantum Science and Technology. 6(4), 045005."},"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","oa":1,"language":[{"iso":"eng"}],"volume":6,"article_type":"original","date_created":"2021-08-08T22:01:25Z","author":[{"full_name":"Mobassem, Sonia","last_name":"Mobassem","first_name":"Sonia"},{"full_name":"Lambert, Nicholas J.","last_name":"Lambert","first_name":"Nicholas J."},{"last_name":"Rueda Sanchez","id":"3B82B0F8-F248-11E8-B48F-1D18A9856A87","full_name":"Rueda Sanchez, Alfredo R","first_name":"Alfredo R","orcid":"0000-0001-6249-5860"},{"full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","last_name":"Fink","first_name":"Johannes M","orcid":"0000-0001-8112-028X"},{"first_name":"Gerd","full_name":"Leuchs, Gerd","last_name":"Leuchs"},{"first_name":"Harald G.L.","full_name":"Schwefel, Harald G.L.","last_name":"Schwefel"}],"day":"15","scopus_import":"1","oa_version":"Published Version","title":"Thermal noise in electro-optic devices at cryogenic temperatures","publication_status":"published","publication_identifier":{"eissn":["2058-9565"]},"file_date_updated":"2021-08-09T12:23:13Z","has_accepted_license":"1","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"intvolume":"         6","abstract":[{"text":"The quantum bits (qubits) on which superconducting quantum computers are based have energy scales corresponding to photons with GHz frequencies. The energy of photons in the gigahertz domain is too low to allow transmission through the noisy room-temperature environment, where the signal would be lost in thermal noise. Optical photons, on the other hand, have much higher energies, and signals can be detected using highly efficient single-photon detectors. Transduction from microwave to optical frequencies is therefore a potential enabling technology for quantum devices. However, in such a device the optical pump can be a source of thermal noise and thus degrade the fidelity; the similarity of input microwave state to the output optical state. In order to investigate the magnitude of this effect we model the sub-Kelvin thermal behavior of an electro-optic transducer based on a lithium niobate whispering gallery mode resonator. We find that there is an optimum power level for a continuous pump, whilst pulsed operation of the pump increases the fidelity of the conversion.","lang":"eng"}],"isi":1,"year":"2021","external_id":{"arxiv":["2008.08764"],"isi":["000673081500001"]},"acknowledgement":"NJL is supported by the MBIE Endeavour Fund (UOOX1805) and GL is by the Julius von Haast Fellowship of New Zealand. SM acknowledges stimulating discussions with T M Jensen.","date_published":"2021-07-15T00:00:00Z","publication":"Quantum Science and Technology","status":"public","date_updated":"2023-10-17T12:54:54Z","_id":"9815","type":"journal_article","doi":"10.1088/2058-9565/ac0f36","article_processing_charge":"Yes","publisher":"IOP Publishing","quality_controlled":"1","ddc":["530"]},{"quality_controlled":"1","ddc":["530"],"page":"040341","type":"journal_article","date_updated":"2023-09-07T13:31:22Z","_id":"9928","publisher":"American Physical Society","doi":"10.1103/PRXQuantum.2.040341","article_processing_charge":"No","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.","date_published":"2021-11-24T00:00:00Z","ec_funded":1,"project":[{"name":"Integrating superconducting quantum circuits","grant_number":"F07105","call_identifier":"FWF","_id":"26927A52-B435-11E9-9278-68D0E5697425"},{"grant_number":"665385","name":"International IST Doctoral Program","call_identifier":"H2020","_id":"2564DBCA-B435-11E9-9278-68D0E5697425"},{"_id":"2622978C-B435-11E9-9278-68D0E5697425","name":"Hybrid Semiconductor - Superconductor Quantum Devices"}],"status":"public","publication":"PRX Quantum","keyword":["quantum physics","mesoscale and nanoscale physics"],"external_id":{"isi":["000723015100001"],"arxiv":["2106.05882"]},"related_material":{"record":[{"relation":"research_data","status":"public","id":"13057"},{"status":"public","relation":"dissertation_contains","id":"9920"}]},"year":"2021","isi":1,"publication_status":"published","publication_identifier":{"eissn":["2691-3399"]},"file_date_updated":"2022-01-18T11:29:33Z","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."}],"tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"intvolume":"         2","acknowledged_ssus":[{"_id":"NanoFab"},{"_id":"M-Shop"}],"has_accepted_license":"1","article_type":"original","date_created":"2021-08-17T08:14:18Z","volume":2,"oa_version":"Published Version","title":"Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction","author":[{"full_name":"Peruzzo, Matilda","id":"3F920B30-F248-11E8-B48F-1D18A9856A87","last_name":"Peruzzo","orcid":"0000-0002-3415-4628","first_name":"Matilda"},{"first_name":"Farid","orcid":"0000-0001-6937-5773","full_name":"Hassani, Farid","id":"2AED110C-F248-11E8-B48F-1D18A9856A87","last_name":"Hassani"},{"last_name":"Szep","full_name":"Szep, Gregory","first_name":"Gregory"},{"first_name":"Andrea","last_name":"Trioni","full_name":"Trioni, Andrea","id":"42F71B44-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Redchenko","id":"2C21D6E8-F248-11E8-B48F-1D18A9856A87","full_name":"Redchenko, Elena","first_name":"Elena"},{"id":"2DCF8DE6-F248-11E8-B48F-1D18A9856A87","full_name":"Zemlicka, Martin","last_name":"Zemlicka","first_name":"Martin"},{"full_name":"Fink, Johannes M","id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","last_name":"Fink","orcid":"0000-0001-8112-028X","first_name":"Johannes M"}],"day":"24","scopus_import":"1","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","issue":"4","citation":{"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.” <i>PRX Quantum</i>. American Physical Society, 2021. <a href=\"https://doi.org/10.1103/PRXQuantum.2.040341\">https://doi.org/10.1103/PRXQuantum.2.040341</a>.","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.","apa":"Peruzzo, M., Hassani, F., Szep, G., Trioni, A., Redchenko, E., Zemlicka, M., &#38; Fink, J. M. (2021). Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction. <i>PRX Quantum</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PRXQuantum.2.040341\">https://doi.org/10.1103/PRXQuantum.2.040341</a>","mla":"Peruzzo, Matilda, et al. “Geometric Superinductance Qubits: Controlling Phase Delocalization across a Single Josephson Junction.” <i>PRX Quantum</i>, vol. 2, no. 4, American Physical Society, 2021, p. 040341, doi:<a href=\"https://doi.org/10.1103/PRXQuantum.2.040341\">10.1103/PRXQuantum.2.040341</a>.","ama":"Peruzzo M, Hassani F, Szep G, et al. Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction. <i>PRX Quantum</i>. 2021;2(4):040341. doi:<a href=\"https://doi.org/10.1103/PRXQuantum.2.040341\">10.1103/PRXQuantum.2.040341</a>","ieee":"M. Peruzzo <i>et al.</i>, “Geometric superinductance qubits: Controlling phase delocalization across a single Josephson junction,” <i>PRX Quantum</i>, vol. 2, no. 4. American Physical Society, p. 040341, 2021.","short":"M. Peruzzo, F. Hassani, G. Szep, A. Trioni, E. Redchenko, M. Zemlicka, J.M. Fink, PRX Quantum 2 (2021) 040341."},"language":[{"iso":"eng"}],"oa":1,"file":[{"file_size":4247422,"date_created":"2022-01-18T11:29:33Z","date_updated":"2022-01-18T11:29:33Z","creator":"cchlebak","file_id":"10641","success":1,"file_name":"2021_PRXQuantum_Peruzzo.pdf","access_level":"open_access","content_type":"application/pdf","relation":"main_file","checksum":"36eb41ea43d8ca22b0efab12419e4eb2"}],"department":[{"_id":"JoFi"},{"_id":"NanoFab"},{"_id":"M-Shop"}],"arxiv":1,"month":"11"},{"oa":1,"language":[{"iso":"eng"}],"issue":"19","citation":{"ama":"Barzanjeh S, Pirandola S, Vitali D, Fink JM. Microwave quantum illumination using a digital receiver. <i>Science Advances</i>. 2020;6(19). doi:<a href=\"https://doi.org/10.1126/sciadv.abb0451\">10.1126/sciadv.abb0451</a>","short":"S. Barzanjeh, S. Pirandola, D. Vitali, J.M. Fink, Science Advances 6 (2020).","ieee":"S. Barzanjeh, S. Pirandola, D. Vitali, and J. M. Fink, “Microwave quantum illumination using a digital receiver,” <i>Science Advances</i>, vol. 6, no. 19. AAAS, 2020.","chicago":"Barzanjeh, Shabir, S. Pirandola, D Vitali, and Johannes M Fink. “Microwave Quantum Illumination Using a Digital Receiver.” <i>Science Advances</i>. AAAS, 2020. <a href=\"https://doi.org/10.1126/sciadv.abb0451\">https://doi.org/10.1126/sciadv.abb0451</a>.","ista":"Barzanjeh S, Pirandola S, Vitali D, Fink JM. 2020. Microwave quantum illumination using a digital receiver. Science Advances. 6(19), eabb0451.","mla":"Barzanjeh, Shabir, et al. “Microwave Quantum Illumination Using a Digital Receiver.” <i>Science Advances</i>, vol. 6, no. 19, eabb0451, AAAS, 2020, doi:<a href=\"https://doi.org/10.1126/sciadv.abb0451\">10.1126/sciadv.abb0451</a>.","apa":"Barzanjeh, S., Pirandola, S., Vitali, D., &#38; Fink, J. M. (2020). Microwave quantum illumination using a digital receiver. <i>Science Advances</i>. AAAS. <a href=\"https://doi.org/10.1126/sciadv.abb0451\">https://doi.org/10.1126/sciadv.abb0451</a>"},"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","month":"05","arxiv":1,"department":[{"_id":"JoFi"}],"article_number":"eabb0451","file":[{"date_created":"2020-06-02T09:18:36Z","file_size":795822,"creator":"dernst","date_updated":"2020-07-14T12:48:05Z","file_id":"7913","file_name":"2020_ScienceAdvances_Barzanjeh.pdf","access_level":"open_access","content_type":"application/pdf","relation":"main_file","checksum":"16fa61cc1951b444ee74c07188cda9da"}],"has_accepted_license":"1","intvolume":"         6","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"abstract":[{"text":"Quantum illumination uses entangled signal-idler photon pairs to boost the detection efficiency of low-reflectivity objects in environments with bright thermal noise. Its advantage is particularly evident at low signal powers, a promising feature for applications such as noninvasive biomedical scanning or low-power short-range radar. Here, we experimentally investigate the concept of quantum illumination at microwave frequencies. We generate entangled fields to illuminate a room-temperature object at a distance of 1 m in a free-space detection setup. We implement a digital phase-conjugate receiver based on linear quadrature measurements that outperforms a symmetric classical noise radar in the same conditions, despite the entanglement-breaking signal path. Starting from experimental data, we also simulate the case of perfect idler photon number detection, which results in a quantum advantage compared with the relative classical benchmark. Our results highlight the opportunities and challenges in the way toward a first room-temperature application of microwave quantum circuits.","lang":"eng"}],"publication_identifier":{"eissn":["23752548"]},"publication_status":"published","file_date_updated":"2020-07-14T12:48:05Z","author":[{"orcid":"0000-0003-0415-1423","first_name":"Shabir","last_name":"Barzanjeh","id":"2D25E1F6-F248-11E8-B48F-1D18A9856A87","full_name":"Barzanjeh, Shabir"},{"first_name":"S.","last_name":"Pirandola","full_name":"Pirandola, S."},{"full_name":"Vitali, D","last_name":"Vitali","first_name":"D"},{"id":"4B591CBA-F248-11E8-B48F-1D18A9856A87","full_name":"Fink, Johannes M","last_name":"Fink","first_name":"Johannes M","orcid":"0000-0001-8112-028X"}],"day":"06","scopus_import":"1","title":"Microwave quantum illumination using a digital receiver","oa_version":"Published Version","volume":6,"article_type":"original","date_created":"2020-05-31T22:00:49Z","project":[{"_id":"26336814-B435-11E9-9278-68D0E5697425","grant_number":"758053","name":"A Fiber Optic Transceiver for Superconducting Qubits","call_identifier":"H2020"},{"name":"Quantum readout techniques and technologies","grant_number":"862644","call_identifier":"H2020","_id":"237CBA6C-32DE-11EA-91FC-C7463DDC885E"},{"call_identifier":"H2020","grant_number":"707438","name":"Microwave-to-Optical Quantum Link: Quantum Teleportation and Quantum Illumination with cavity Optomechanics SUPEREOM","_id":"258047B6-B435-11E9-9278-68D0E5697425"},{"name":"Hybrid Optomechanical Technologies","grant_number":"732894","call_identifier":"H2020","_id":"257EB838-B435-11E9-9278-68D0E5697425"},{"grant_number":"F07105","name":"Integrating superconducting quantum circuits","call_identifier":"FWF","_id":"26927A52-B435-11E9-9278-68D0E5697425"}],"status":"public","publication":"Science Advances","ec_funded":1,"date_published":"2020-05-06T00:00:00Z","isi":1,"year":"2020","external_id":{"isi":["000531171100045"],"arxiv":["1908.03058"]},"related_material":{"link":[{"relation":"press_release","url":"https://ist.ac.at/en/news/scientists-demonstrate-quantum-radar-prototype/","description":"News on IST Homepage"}],"record":[{"id":"9001","relation":"later_version","status":"public"}]},"ddc":["530"],"quality_controlled":"1","doi":"10.1126/sciadv.abb0451","article_processing_charge":"No","publisher":"AAAS","date_updated":"2024-09-10T12:23:52Z","_id":"7910","type":"journal_article"}]