[{"month":"06","title":"Artificial atoms from cold bosons in one dimension","date_updated":"2023-08-03T11:57:41Z","ec_funded":1,"article_processing_charge":"No","date_published":"2022-06-01T00:00:00Z","publication":"New Journal of Physics","file_date_updated":"2022-07-18T06:33:13Z","external_id":{"isi":["000818530000001"]},"date_created":"2022-07-17T22:01:55Z","_id":"11590","project":[{"name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","_id":"260C2330-B435-11E9-9278-68D0E5697425","grant_number":"754411"},{"name":"Angulon: physics and applications of a new quasiparticle","call_identifier":"H2020","_id":"2688CF98-B435-11E9-9278-68D0E5697425","grant_number":"801770"}],"volume":24,"oa":1,"intvolume":"        24","acknowledgement":"This work has received funding from the DFG Project No. 413495248 [VO 2437/1-1] (FB, H-WH, AGV) and European Union's Horizon 2020 research and innovation programme under the Marie Skĺodowska-Curie Grant Agreement No. 754411 (AGV). ML acknowledges support by the European Research Council (ERC) Starting Grant No. 801770 (ANGULON). SIM acknowledges support from the NSF through a grant for ITAMP at Harvard University.","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","issue":"6","article_number":"063036","scopus_import":"1","tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"department":[{"_id":"MiLe"}],"publication_identifier":{"issn":["1367-2630"]},"year":"2022","isi":1,"author":[{"first_name":"Fabian","full_name":"Brauneis, Fabian","last_name":"Brauneis"},{"first_name":"Timothy G.","last_name":"Backert","full_name":"Backert, Timothy G."},{"first_name":"Simeon I.","last_name":"Mistakidis","full_name":"Mistakidis, Simeon I."},{"id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","first_name":"Mikhail","last_name":"Lemeshko","orcid":"0000-0002-6990-7802","full_name":"Lemeshko, Mikhail"},{"first_name":"Hans Werner","full_name":"Hammer, Hans Werner","last_name":"Hammer"},{"full_name":"Volosniev, Artem","orcid":"0000-0003-0393-5525","last_name":"Volosniev","first_name":"Artem","id":"37D278BC-F248-11E8-B48F-1D18A9856A87"}],"oa_version":"Published Version","doi":"10.1088/1367-2630/ac78d8","day":"01","publisher":"IOP Publishing","status":"public","has_accepted_license":"1","language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"We investigate the ground-state properties of weakly repulsive one-dimensional bosons in the presence of an attractive zero-range impurity potential. First, we derive mean-field solutions to the problem on a finite ring for the two asymptotic cases: (i) all bosons are bound to the impurity and (ii) all bosons are in a scattering state. Moreover, we derive the critical line that separates these regimes in the parameter space. In the thermodynamic limit, this critical line determines the maximum number of bosons that can be bound by the impurity potential, forming an artificial atom. Second, we validate the mean-field results using the flow equation approach and the multi-layer multi-configuration time-dependent Hartree method for atomic mixtures. While beyond-mean-field effects destroy long-range order in the Bose gas, the critical boson number is unaffected. Our findings are important for understanding such artificial atoms in low-density Bose gases with static and mobile impurities."}],"publication_status":"published","quality_controlled":"1","type":"journal_article","citation":{"ieee":"F. Brauneis, T. G. Backert, S. I. Mistakidis, M. Lemeshko, H. W. Hammer, and A. Volosniev, “Artificial atoms from cold bosons in one dimension,” <i>New Journal of Physics</i>, vol. 24, no. 6. IOP Publishing, 2022.","apa":"Brauneis, F., Backert, T. G., Mistakidis, S. I., Lemeshko, M., Hammer, H. W., &#38; Volosniev, A. (2022). Artificial atoms from cold bosons in one dimension. <i>New Journal of Physics</i>. IOP Publishing. <a href=\"https://doi.org/10.1088/1367-2630/ac78d8\">https://doi.org/10.1088/1367-2630/ac78d8</a>","short":"F. Brauneis, T.G. Backert, S.I. Mistakidis, M. Lemeshko, H.W. Hammer, A. Volosniev, New Journal of Physics 24 (2022).","ista":"Brauneis F, Backert TG, Mistakidis SI, Lemeshko M, Hammer HW, Volosniev A. 2022. Artificial atoms from cold bosons in one dimension. New Journal of Physics. 24(6), 063036.","mla":"Brauneis, Fabian, et al. “Artificial Atoms from Cold Bosons in One Dimension.” <i>New Journal of Physics</i>, vol. 24, no. 6, 063036, IOP Publishing, 2022, doi:<a href=\"https://doi.org/10.1088/1367-2630/ac78d8\">10.1088/1367-2630/ac78d8</a>.","chicago":"Brauneis, Fabian, Timothy G. Backert, Simeon I. Mistakidis, Mikhail Lemeshko, Hans Werner Hammer, and Artem Volosniev. “Artificial Atoms from Cold Bosons in One Dimension.” <i>New Journal of Physics</i>. IOP Publishing, 2022. <a href=\"https://doi.org/10.1088/1367-2630/ac78d8\">https://doi.org/10.1088/1367-2630/ac78d8</a>.","ama":"Brauneis F, Backert TG, Mistakidis SI, Lemeshko M, Hammer HW, Volosniev A. Artificial atoms from cold bosons in one dimension. <i>New Journal of Physics</i>. 2022;24(6). doi:<a href=\"https://doi.org/10.1088/1367-2630/ac78d8\">10.1088/1367-2630/ac78d8</a>"},"file":[{"content_type":"application/pdf","date_updated":"2022-07-18T06:33:13Z","file_size":3415721,"relation":"main_file","checksum":"dc67b60f2e50e9ef2bd820ca0d7333d2","success":1,"access_level":"open_access","file_name":"2022_NewJournalPhysics_Brauneis.pdf","file_id":"11594","creator":"dernst","date_created":"2022-07-18T06:33:13Z"}],"article_type":"original","ddc":["530"]},{"scopus_import":"1","acknowledgement":"IC acknowledges the support by the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 665385. GB acknowledges support from the Austrian Science Fund (FWF), under Project No. M2461-N27 and from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy EXC2181/1-390900948 (the Heidelberg STRUCTURES Excellence Cluster). ML acknowledges support by the Austrian Science Fund (FWF), under Project No. P29902-N27, and by the European Research Council (ERC) starting Grant No. 801770 (ANGULON). HS acknowledges support from the Independent Research Fund Denmark (Project No. 8021-00232B) and from the Villum Fonden through a Villum Investigator Grant No. 25886.","issue":"7","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","oa":1,"intvolume":"        24","article_number":"075004","volume":24,"date_created":"2022-08-28T22:02:01Z","external_id":{"isi":["000839216900001"]},"_id":"11998","project":[{"name":"International IST Doctoral Program","call_identifier":"H2020","grant_number":"665385","_id":"2564DBCA-B435-11E9-9278-68D0E5697425"},{"call_identifier":"H2020","grant_number":"801770","_id":"2688CF98-B435-11E9-9278-68D0E5697425","name":"Angulon: physics and applications of a new quasiparticle"},{"grant_number":"M02641","_id":"26986C82-B435-11E9-9278-68D0E5697425","call_identifier":"FWF","name":"A path-integral approach to composite impurities"}],"file_date_updated":"2022-08-29T09:57:40Z","publication":"New Journal of Physics","ec_funded":1,"date_published":"2022-08-11T00:00:00Z","article_processing_charge":"Yes","month":"08","date_updated":"2024-08-07T07:16:52Z","title":"A simple model for high rotational excitations of molecules in a superfluid","article_type":"original","ddc":["530"],"type":"journal_article","citation":{"chicago":"Cherepanov, Igor, Giacomo Bighin, Constant A. Schouder, Adam S. Chatterley, Henrik Stapelfeldt, and Mikhail Lemeshko. “A Simple Model for High Rotational Excitations of Molecules in a Superfluid.” <i>New Journal of Physics</i>. IOP, 2022. <a href=\"https://doi.org/10.1088/1367-2630/ac8113\">https://doi.org/10.1088/1367-2630/ac8113</a>.","ama":"Cherepanov I, Bighin G, Schouder CA, Chatterley AS, Stapelfeldt H, Lemeshko M. A simple model for high rotational excitations of molecules in a superfluid. <i>New Journal of Physics</i>. 2022;24(7). doi:<a href=\"https://doi.org/10.1088/1367-2630/ac8113\">10.1088/1367-2630/ac8113</a>","ista":"Cherepanov I, Bighin G, Schouder CA, Chatterley AS, Stapelfeldt H, Lemeshko M. 2022. A simple model for high rotational excitations of molecules in a superfluid. New Journal of Physics. 24(7), 075004.","mla":"Cherepanov, Igor, et al. “A Simple Model for High Rotational Excitations of Molecules in a Superfluid.” <i>New Journal of Physics</i>, vol. 24, no. 7, 075004, IOP, 2022, doi:<a href=\"https://doi.org/10.1088/1367-2630/ac8113\">10.1088/1367-2630/ac8113</a>.","apa":"Cherepanov, I., Bighin, G., Schouder, C. A., Chatterley, A. S., Stapelfeldt, H., &#38; Lemeshko, M. (2022). A simple model for high rotational excitations of molecules in a superfluid. <i>New Journal of Physics</i>. IOP. <a href=\"https://doi.org/10.1088/1367-2630/ac8113\">https://doi.org/10.1088/1367-2630/ac8113</a>","short":"I. Cherepanov, G. Bighin, C.A. Schouder, A.S. Chatterley, H. Stapelfeldt, M. Lemeshko, New Journal of Physics 24 (2022).","ieee":"I. Cherepanov, G. Bighin, C. A. Schouder, A. S. Chatterley, H. Stapelfeldt, and M. Lemeshko, “A simple model for high rotational excitations of molecules in a superfluid,” <i>New Journal of Physics</i>, vol. 24, no. 7. IOP, 2022."},"file":[{"content_type":"application/pdf","date_updated":"2022-08-29T09:57:40Z","file_size":1912882,"checksum":"10116a08d3489befc13dba2cc44490f1","relation":"main_file","success":1,"access_level":"open_access","file_name":"2022_NewJournalofPhysics_Cherepanov.pdf","file_id":"12005","date_created":"2022-08-29T09:57:40Z","creator":"alisjak"}],"quality_controlled":"1","language":[{"iso":"eng"}],"has_accepted_license":"1","status":"public","abstract":[{"text":"Recently it became possible to study highly excited rotational states of molecules in superfluid helium through nonadiabatic alignment experiments (Cherepanov et al 2021 Phys. Rev. A 104 L061303). This calls for theoretical approaches that go beyond explaining renormalized values of molecular spectroscopic constants, which suffices when only the lowest few rotational states are involved. As the first step in this direction, here we present a basic quantum mechanical model describing highly excited rotational states of molecules in superfluid helium nanodroplets. We show that a linear molecule immersed in a superfluid can be seen as an effective symmetric top, similar to the rotational structure of radicals, such as OH or NO, but with the angular momentum of the superfluid playing the role of the electronic angular momentum in free molecules. The simple theory sheds light onto what happens when the rotational angular momentum of the molecule increases beyond the lowest excited states accessible by infrared spectroscopy. In addition, the model allows to estimate the effective rotational and centrifugal distortion constants for a broad range of species and to explain the crossover between light and heavy molecules in superfluid 4He in terms of the many-body wavefunction structure. Some of the above mentioned insights can be acquired by analyzing a simple 2 × 2 matrix.","lang":"eng"}],"publication_status":"published","day":"11","publisher":"IOP","oa_version":"Published Version","doi":"10.1088/1367-2630/ac8113","author":[{"last_name":"Cherepanov","full_name":"Cherepanov, Igor","first_name":"Igor","id":"339C7E5A-F248-11E8-B48F-1D18A9856A87"},{"orcid":"0000-0001-8823-9777","full_name":"Bighin, Giacomo","last_name":"Bighin","first_name":"Giacomo","id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87"},{"first_name":"Constant A.","last_name":"Schouder","full_name":"Schouder, Constant A."},{"first_name":"Adam S.","full_name":"Chatterley, Adam S.","last_name":"Chatterley"},{"full_name":"Stapelfeldt, Henrik","last_name":"Stapelfeldt","first_name":"Henrik"},{"full_name":"Lemeshko, Mikhail","orcid":"0000-0002-6990-7802","last_name":"Lemeshko","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","first_name":"Mikhail"}],"isi":1,"year":"2022","tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"department":[{"_id":"MiLe"}],"publication_identifier":{"issn":["1367-2630"]}},{"article_number":"123042","intvolume":"        23","oa":1,"issue":"12","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","acknowledgement":"PG acknowledges support from National Science Foundation Awards No. DMR-1824265 for this work. AG acknowledges support from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 754411. EMN is supported by ASU startup grant. OE is in part supported by NSF-DMR-1904716.","volume":23,"scopus_import":"1","article_processing_charge":"No","date_published":"2021-12-23T00:00:00Z","ec_funded":1,"title":"Shadow surface states in topological Kondo insulators","date_updated":"2023-08-17T06:54:54Z","month":"12","project":[{"name":"ISTplus - Postdoctoral Fellowships","call_identifier":"H2020","grant_number":"754411","_id":"260C2330-B435-11E9-9278-68D0E5697425"}],"_id":"10628","external_id":{"arxiv":["2012.11625"],"isi":["000734063700001"]},"date_created":"2022-01-16T23:01:28Z","publication":"New Journal of Physics","file_date_updated":"2022-01-17T10:01:58Z","quality_controlled":"1","publication_status":"published","abstract":[{"lang":"eng","text":"The surface states of 3D topological insulators in general have negligible quantum oscillations (QOs) when the chemical potential is tuned to the Dirac points. In contrast, we find that topological Kondo insulators (TKIs) can support surface states with an arbitrarily large Fermi surface (FS) when the chemical potential is pinned to the Dirac point. We illustrate that these FSs give rise to finite-frequency QOs, which can become comparable to the extremal area of the unhybridized bulk bands. We show that this occurs when the crystal symmetry is lowered from cubic to tetragonal in a minimal two-orbital model. We label such surface modes as 'shadow surface states'. Moreover, we show that the sufficient next-nearest neighbor out-of-plane hybridization leading to shadow surface states can be self-consistently stabilized for tetragonal TKIs. Consequently, shadow surface states provide an important example of high-frequency QOs beyond the context of cubic TKIs."}],"status":"public","has_accepted_license":"1","language":[{"iso":"eng"}],"ddc":["530"],"article_type":"original","file":[{"file_id":"10632","creator":"cchlebak","date_created":"2022-01-17T10:01:58Z","relation":"main_file","checksum":"0c3cb6816242fa8afd1cc87a5fe77821","file_size":2533102,"content_type":"application/pdf","date_updated":"2022-01-17T10:01:58Z","file_name":"2021_NewJourPhys_Ghazaryan.pdf","access_level":"open_access","success":1}],"type":"journal_article","citation":{"ieee":"A. Ghazaryan, E. M. Nica, O. Erten, and P. Ghaemi, “Shadow surface states in topological Kondo insulators,” <i>New Journal of Physics</i>, vol. 23, no. 12. IOP Publishing, 2021.","apa":"Ghazaryan, A., Nica, E. M., Erten, O., &#38; Ghaemi, P. (2021). Shadow surface states in topological Kondo insulators. <i>New Journal of Physics</i>. IOP Publishing. <a href=\"https://doi.org/10.1088/1367-2630/ac4124\">https://doi.org/10.1088/1367-2630/ac4124</a>","short":"A. Ghazaryan, E.M. Nica, O. Erten, P. Ghaemi, New Journal of Physics 23 (2021).","mla":"Ghazaryan, Areg, et al. “Shadow Surface States in Topological Kondo Insulators.” <i>New Journal of Physics</i>, vol. 23, no. 12, 123042, IOP Publishing, 2021, doi:<a href=\"https://doi.org/10.1088/1367-2630/ac4124\">10.1088/1367-2630/ac4124</a>.","ista":"Ghazaryan A, Nica EM, Erten O, Ghaemi P. 2021. Shadow surface states in topological Kondo insulators. New Journal of Physics. 23(12), 123042.","ama":"Ghazaryan A, Nica EM, Erten O, Ghaemi P. Shadow surface states in topological Kondo insulators. <i>New Journal of Physics</i>. 2021;23(12). doi:<a href=\"https://doi.org/10.1088/1367-2630/ac4124\">10.1088/1367-2630/ac4124</a>","chicago":"Ghazaryan, Areg, Emilian M. Nica, Onur Erten, and Pouyan Ghaemi. “Shadow Surface States in Topological Kondo Insulators.” <i>New Journal of Physics</i>. IOP Publishing, 2021. <a href=\"https://doi.org/10.1088/1367-2630/ac4124\">https://doi.org/10.1088/1367-2630/ac4124</a>."},"year":"2021","isi":1,"author":[{"orcid":"0000-0001-9666-3543","full_name":"Ghazaryan, Areg","last_name":"Ghazaryan","id":"4AF46FD6-F248-11E8-B48F-1D18A9856A87","first_name":"Areg"},{"first_name":"Emilian M.","full_name":"Nica, Emilian M.","last_name":"Nica"},{"last_name":"Erten","full_name":"Erten, Onur","first_name":"Onur"},{"first_name":"Pouyan","full_name":"Ghaemi, Pouyan","last_name":"Ghaemi"}],"department":[{"_id":"MiLe"}],"publication_identifier":{"issn":["1367-2630"]},"tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"publisher":"IOP Publishing","day":"23","doi":"10.1088/1367-2630/ac4124","oa_version":"Published Version","arxiv":1},{"publication":"New Journal of Physics","file_date_updated":"2021-02-18T14:53:33Z","_id":"9164","date_created":"2021-02-18T14:17:32Z","title":"Focus on active colloids and nanoparticles","date_updated":"2021-02-18T14:57:39Z","month":"06","keyword":["General Physics and Astronomy"],"article_processing_charge":"No","date_published":"2020-06-01T00:00:00Z","extern":"1","scopus_import":"1","volume":22,"article_number":"060201","oa":1,"intvolume":"        22","user_id":"D865714E-FA4E-11E9-B85B-F5C5E5697425","issue":"6","doi":"10.1088/1367-2630/ab90d9","oa_version":"Published Version","publisher":"IOP Publishing","day":"01","publication_identifier":{"issn":["1367-2630"]},"tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode"},"year":"2020","author":[{"first_name":"Thomas","last_name":"Speck","full_name":"Speck, Thomas"},{"full_name":"Tailleur, Julien","last_name":"Tailleur","first_name":"Julien"},{"orcid":"0000-0002-7253-9465","full_name":"Palacci, Jérémie A","last_name":"Palacci","first_name":"Jérémie A","id":"8fb92548-2b22-11eb-b7c1-a3f0d08d7c7d"}],"file":[{"file_id":"9169","date_created":"2021-02-18T14:53:33Z","creator":"cziletti","relation":"main_file","checksum":"02759f3ab228c1a061e747155a20f851","date_updated":"2021-02-18T14:53:33Z","content_type":"application/pdf","file_size":953338,"file_name":"2020_NewJournPhys_Speck.pdf","success":1,"access_level":"open_access"}],"citation":{"chicago":"Speck, Thomas, Julien Tailleur, and Jérémie A Palacci. “Focus on Active Colloids and Nanoparticles.” <i>New Journal of Physics</i>. IOP Publishing, 2020. <a href=\"https://doi.org/10.1088/1367-2630/ab90d9\">https://doi.org/10.1088/1367-2630/ab90d9</a>.","ama":"Speck T, Tailleur J, Palacci JA. Focus on active colloids and nanoparticles. <i>New Journal of Physics</i>. 2020;22(6). doi:<a href=\"https://doi.org/10.1088/1367-2630/ab90d9\">10.1088/1367-2630/ab90d9</a>","ista":"Speck T, Tailleur J, Palacci JA. 2020. Focus on active colloids and nanoparticles. New Journal of Physics. 22(6), 060201.","mla":"Speck, Thomas, et al. “Focus on Active Colloids and Nanoparticles.” <i>New Journal of Physics</i>, vol. 22, no. 6, 060201, IOP Publishing, 2020, doi:<a href=\"https://doi.org/10.1088/1367-2630/ab90d9\">10.1088/1367-2630/ab90d9</a>.","apa":"Speck, T., Tailleur, J., &#38; Palacci, J. A. (2020). Focus on active colloids and nanoparticles. <i>New Journal of Physics</i>. IOP Publishing. <a href=\"https://doi.org/10.1088/1367-2630/ab90d9\">https://doi.org/10.1088/1367-2630/ab90d9</a>","short":"T. Speck, J. Tailleur, J.A. Palacci, New Journal of Physics 22 (2020).","ieee":"T. Speck, J. Tailleur, and J. A. Palacci, “Focus on active colloids and nanoparticles,” <i>New Journal of Physics</i>, vol. 22, no. 6. IOP Publishing, 2020."},"type":"journal_article","ddc":["530"],"article_type":"letter_note","publication_status":"published","has_accepted_license":"1","status":"public","language":[{"iso":"eng"}],"quality_controlled":"1"}]