[{"date_published":"2023-09-11T00:00:00Z","ddc":["530"],"publication_status":"published","oa":1,"has_accepted_license":"1","intvolume":"       159","citation":{"ieee":"R. Al Hyder, A. Cappellaro, M. Lemeshko, and A. Volosniev, “Achiral dipoles on a ferromagnet can affect its magnetization direction,” <i>The Journal of Chemical Physics</i>, vol. 159, no. 10. AIP Publishing, 2023.","chicago":"Al Hyder, Ragheed, Alberto Cappellaro, Mikhail Lemeshko, and Artem Volosniev. “Achiral Dipoles on a Ferromagnet Can Affect Its Magnetization Direction.” <i>The Journal of Chemical Physics</i>. AIP Publishing, 2023. <a href=\"https://doi.org/10.1063/5.0165806\">https://doi.org/10.1063/5.0165806</a>.","short":"R. Al Hyder, A. Cappellaro, M. Lemeshko, A. Volosniev, The Journal of Chemical Physics 159 (2023).","ama":"Al Hyder R, Cappellaro A, Lemeshko M, Volosniev A. Achiral dipoles on a ferromagnet can affect its magnetization direction. <i>The Journal of Chemical Physics</i>. 2023;159(10). doi:<a href=\"https://doi.org/10.1063/5.0165806\">10.1063/5.0165806</a>","mla":"Al Hyder, Ragheed, et al. “Achiral Dipoles on a Ferromagnet Can Affect Its Magnetization Direction.” <i>The Journal of Chemical Physics</i>, vol. 159, no. 10, 104103, AIP Publishing, 2023, doi:<a href=\"https://doi.org/10.1063/5.0165806\">10.1063/5.0165806</a>.","ista":"Al Hyder R, Cappellaro A, Lemeshko M, Volosniev A. 2023. Achiral dipoles on a ferromagnet can affect its magnetization direction. The Journal of Chemical Physics. 159(10), 104103.","apa":"Al Hyder, R., Cappellaro, A., Lemeshko, M., &#38; Volosniev, A. (2023). Achiral dipoles on a ferromagnet can affect its magnetization direction. <i>The Journal of Chemical Physics</i>. AIP Publishing. <a href=\"https://doi.org/10.1063/5.0165806\">https://doi.org/10.1063/5.0165806</a>"},"status":"public","external_id":{"pmid":["37694742"],"arxiv":["2306.17592"]},"volume":159,"date_created":"2023-09-13T09:25:09Z","file_date_updated":"2023-09-13T09:34:20Z","month":"09","oa_version":"Published Version","type":"journal_article","abstract":[{"text":"We demonstrate the possibility of a coupling between the magnetization direction of a ferromagnet and the tilting angle of adsorbed achiral molecules. To illustrate the mechanism of the coupling, we analyze a minimal Stoner model that includes Rashba spin–orbit coupling due to the electric field on the surface of the ferromagnet. The proposed mechanism allows us to study magnetic anisotropy of the system with an extended Stoner–Wohlfarth model and argue that adsorbed achiral molecules can change magnetocrystalline anisotropy of the substrate. Our research aims to motivate further experimental studies of the current-free chirality induced spin selectivity effect involving both enantiomers.","lang":"eng"}],"date_updated":"2023-09-20T09:48:12Z","_id":"14321","acknowledgement":"We thank Zhanybek Alpichshev, Mohammad Reza Safari, Binghai Yan, and Yossi Paltiel for enlightening discussions.\r\nM.L. acknowledges support from the European Research Council (ERC) Starting Grant No. 801770 (ANGULON). A. C. received funding from the European Union’s Horizon Europe research and innovation program under the Marie Skłodowska-Curie Grant Agreement No. 101062862 - NeqMolRot.","year":"2023","doi":"10.1063/5.0165806","quality_controlled":"1","publication_identifier":{"issn":["0021-9606"],"eissn":["1089-7690"]},"keyword":["Physical and Theoretical Chemistry","General Physics and Astronomy"],"issue":"10","language":[{"iso":"eng"}],"project":[{"_id":"bd7b5202-d553-11ed-ba76-9b1c1b258338","name":"Non-equilibrium Field Theory of Molecular Rotations","grant_number":"101062862"},{"name":"Angulon: physics and applications of a new quasiparticle","_id":"2688CF98-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"801770"}],"article_number":"104103","arxiv":1,"title":"Achiral dipoles on a ferromagnet can affect its magnetization direction","author":[{"full_name":"Al Hyder, Ragheed","id":"d1c405be-ae15-11ed-8510-ccf53278162e","last_name":"Al Hyder","first_name":"Ragheed"},{"full_name":"Cappellaro, Alberto","orcid":"0000-0001-6110-2359","id":"9d13b3cb-30a2-11eb-80dc-f772505e8660","first_name":"Alberto","last_name":"Cappellaro"},{"id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-6990-7802","full_name":"Lemeshko, Mikhail","last_name":"Lemeshko","first_name":"Mikhail"},{"last_name":"Volosniev","first_name":"Artem","full_name":"Volosniev, Artem","id":"37D278BC-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0003-0393-5525"}],"day":"11","file":[{"access_level":"open_access","date_created":"2023-09-13T09:34:20Z","checksum":"507ab65ab29e2c987c94cabad7c5370b","date_updated":"2023-09-13T09:34:20Z","file_id":"14322","creator":"acappell","relation":"main_file","content_type":"application/pdf","file_size":5749653,"success":1,"file_name":"104103_1_5.0165806.pdf"}],"publication":"The Journal of Chemical Physics","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"article_type":"original","ec_funded":1,"scopus_import":"1","article_processing_charge":"Yes (in subscription journal)","publisher":"AIP Publishing","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","department":[{"_id":"MiLe"}],"pmid":1},{"abstract":[{"text":"Brownian motion of a mobile impurity in a bath is affected by spin-orbit coupling (SOC). Here, we discuss a Caldeira-Leggett-type model that can be used to propose and interpret quantum simulators of this problem in cold Bose gases. First, we derive a master equation that describes the model and explore it in a one-dimensional (1D) setting. To validate the standard assumptions needed for our derivation, we analyze available experimental data without SOC; as a byproduct, this analysis suggests that the quench dynamics of the impurity is beyond the 1D Bose-polaron approach at temperatures currently accessible in a cold-atom laboratory—motion of the impurity is mainly driven by dissipation. For systems with SOC, we demonstrate that 1D spin-orbit coupling can be gauged out even in the presence of dissipation—the information about SOC is incorporated in the initial conditions. Observables sensitive to this information (such as spin densities) can be used to study formation of steady spin polarization domains during quench dynamics.","lang":"eng"}],"date_updated":"2023-02-20T07:02:00Z","oa_version":"Published Version","month":"01","type":"journal_article","file_date_updated":"2023-02-13T10:38:10Z","date_created":"2023-02-10T09:02:26Z","volume":5,"year":"2023","acknowledgement":"We thank Rafael Barfknecht for help at the initial stages of this project; Fabian Brauneis for useful discussions; Miguel A. Garcia-March, Georgios Koutentakis, and Simeon Mistakidis\r\nfor comments on the paper. M.L. acknowledges support by the European Research Council (ERC) Starting Grant No. 801770 (ANGULON).","_id":"12534","has_accepted_license":"1","oa":1,"publication_status":"published","ddc":["530"],"date_published":"2023-01-20T00:00:00Z","status":"public","citation":{"apa":"Ghazaryan, A., Cappellaro, A., Lemeshko, M., &#38; Volosniev, A. (2023). Dissipative dynamics of an impurity with spin-orbit coupling. <i>Physical Review Research</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevresearch.5.013029\">https://doi.org/10.1103/physrevresearch.5.013029</a>","mla":"Ghazaryan, Areg, et al. “Dissipative Dynamics of an Impurity with Spin-Orbit Coupling.” <i>Physical Review Research</i>, vol. 5, no. 1, 013029, American Physical Society, 2023, doi:<a href=\"https://doi.org/10.1103/physrevresearch.5.013029\">10.1103/physrevresearch.5.013029</a>.","ista":"Ghazaryan A, Cappellaro A, Lemeshko M, Volosniev A. 2023. Dissipative dynamics of an impurity with spin-orbit coupling. Physical Review Research. 5(1), 013029.","ama":"Ghazaryan A, Cappellaro A, Lemeshko M, Volosniev A. Dissipative dynamics of an impurity with spin-orbit coupling. <i>Physical Review Research</i>. 2023;5(1). doi:<a href=\"https://doi.org/10.1103/physrevresearch.5.013029\">10.1103/physrevresearch.5.013029</a>","short":"A. Ghazaryan, A. Cappellaro, M. Lemeshko, A. Volosniev, Physical Review Research 5 (2023).","chicago":"Ghazaryan, Areg, Alberto Cappellaro, Mikhail Lemeshko, and Artem Volosniev. “Dissipative Dynamics of an Impurity with Spin-Orbit Coupling.” <i>Physical Review Research</i>. American Physical Society, 2023. <a href=\"https://doi.org/10.1103/physrevresearch.5.013029\">https://doi.org/10.1103/physrevresearch.5.013029</a>.","ieee":"A. Ghazaryan, A. Cappellaro, M. Lemeshko, and A. Volosniev, “Dissipative dynamics of an impurity with spin-orbit coupling,” <i>Physical Review Research</i>, vol. 5, no. 1. American Physical Society, 2023."},"intvolume":"         5","file":[{"access_level":"open_access","date_created":"2023-02-13T10:38:10Z","checksum":"6068b62874c0099628a108bb9c5c6bd2","file_id":"12546","date_updated":"2023-02-13T10:38:10Z","creator":"dernst","file_size":865150,"relation":"main_file","content_type":"application/pdf","file_name":"2023_PhysicalReviewResearch_Ghazaryan.pdf","success":1}],"day":"20","author":[{"full_name":"Ghazaryan, Areg","orcid":"0000-0001-9666-3543","id":"4AF46FD6-F248-11E8-B48F-1D18A9856A87","last_name":"Ghazaryan","first_name":"Areg"},{"last_name":"Cappellaro","first_name":"Alberto","id":"9d13b3cb-30a2-11eb-80dc-f772505e8660","orcid":"0000-0001-6110-2359","full_name":"Cappellaro, Alberto"},{"full_name":"Lemeshko, Mikhail","orcid":"0000-0002-6990-7802","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","first_name":"Mikhail","last_name":"Lemeshko"},{"last_name":"Volosniev","first_name":"Artem","full_name":"Volosniev, Artem","id":"37D278BC-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0003-0393-5525"}],"title":"Dissipative dynamics of an impurity with spin-orbit coupling","article_number":"013029","department":[{"_id":"MiLe"}],"publisher":"American Physical Society","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_processing_charge":"No","ec_funded":1,"scopus_import":"1","article_type":"original","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"publication":"Physical Review Research","publication_identifier":{"issn":["2643-1564"]},"quality_controlled":"1","doi":"10.1103/physrevresearch.5.013029","project":[{"_id":"2688CF98-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"Angulon: physics and applications of a new quasiparticle","grant_number":"801770"}],"language":[{"iso":"eng"}],"issue":"1"},{"isi":1,"issue":"6","language":[{"iso":"eng"}],"doi":"10.1103/PhysRevA.105.063329","quality_controlled":"1","publication_identifier":{"issn":["2469-9926"],"eissn":["2469-9934"]},"publication":"Physical Review A","article_type":"original","scopus_import":"1","article_processing_charge":"No","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","publisher":"American Physical Society","department":[{"_id":"MiLe"}],"article_number":"063329","arxiv":1,"title":"Unitary Fermi superfluid near the critical temperature: Thermodynamics and sound modes from elementary excitations","author":[{"last_name":"Bighin","first_name":"Giacomo","full_name":"Bighin, Giacomo","id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8823-9777"},{"first_name":"Alberto","last_name":"Cappellaro","full_name":"Cappellaro, Alberto","orcid":"0000-0001-6110-2359","id":"9d13b3cb-30a2-11eb-80dc-f772505e8660"},{"full_name":"Salasnich, L.","last_name":"Salasnich","first_name":"L."}],"day":"30","intvolume":"       105","citation":{"ama":"Bighin G, Cappellaro A, Salasnich L. Unitary Fermi superfluid near the critical temperature: Thermodynamics and sound modes from elementary excitations. <i>Physical Review A</i>. 2022;105(6). doi:<a href=\"https://doi.org/10.1103/PhysRevA.105.063329\">10.1103/PhysRevA.105.063329</a>","ista":"Bighin G, Cappellaro A, Salasnich L. 2022. Unitary Fermi superfluid near the critical temperature: Thermodynamics and sound modes from elementary excitations. Physical Review A. 105(6), 063329.","mla":"Bighin, Giacomo, et al. “Unitary Fermi Superfluid near the Critical Temperature: Thermodynamics and Sound Modes from Elementary Excitations.” <i>Physical Review A</i>, vol. 105, no. 6, 063329, American Physical Society, 2022, doi:<a href=\"https://doi.org/10.1103/PhysRevA.105.063329\">10.1103/PhysRevA.105.063329</a>.","apa":"Bighin, G., Cappellaro, A., &#38; Salasnich, L. (2022). Unitary Fermi superfluid near the critical temperature: Thermodynamics and sound modes from elementary excitations. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.105.063329\">https://doi.org/10.1103/PhysRevA.105.063329</a>","ieee":"G. Bighin, A. Cappellaro, and L. Salasnich, “Unitary Fermi superfluid near the critical temperature: Thermodynamics and sound modes from elementary excitations,” <i>Physical Review A</i>, vol. 105, no. 6. American Physical Society, 2022.","chicago":"Bighin, Giacomo, Alberto Cappellaro, and L. Salasnich. “Unitary Fermi Superfluid near the Critical Temperature: Thermodynamics and Sound Modes from Elementary Excitations.” <i>Physical Review A</i>. American Physical Society, 2022. <a href=\"https://doi.org/10.1103/PhysRevA.105.063329\">https://doi.org/10.1103/PhysRevA.105.063329</a>.","short":"G. Bighin, A. Cappellaro, L. Salasnich, Physical Review A 105 (2022)."},"external_id":{"isi":["000829758500010"],"arxiv":["2206.03924"]},"status":"public","date_published":"2022-06-30T00:00:00Z","main_file_link":[{"url":" https://doi.org/10.48550/arXiv.2206.03924","open_access":"1"}],"oa":1,"publication_status":"published","_id":"11592","acknowledgement":"The authors gratefully acknowledge stimulating discussions with T. Enss, and thank an anonymous referee for suggestions and remarks that allowed us to improve the original manuscript. This work is supported by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy EXC2181/1-390900948 (the Heidelberg STRUCTURES Excellence Cluster).","year":"2022","volume":105,"date_created":"2022-07-17T22:01:55Z","oa_version":"Preprint","month":"06","type":"journal_article","abstract":[{"text":"We compare recent experimental results [Science 375, 528 (2022)] of the superfluid unitary Fermi gas near the critical temperature with a thermodynamic model based on the elementary excitations of the system. We find good agreement between experimental data and our theory for several quantities such as first sound, second sound, and superfluid fraction. We also show that mode mixing between first and second sound occurs. Finally, we characterize the response amplitude to a density perturbation: Close to the critical temperature both first and second sound can be excited through a density perturbation, whereas at lower temperatures only the first sound mode exhibits a significant response.","lang":"eng"}],"date_updated":"2023-08-03T12:00:11Z"},{"doi":"10.3390/sym14102182","quality_controlled":"1","publication_identifier":{"issn":["2073-8994"]},"keyword":["Physics and Astronomy (miscellaneous)","General Mathematics","Chemistry (miscellaneous)","Computer Science (miscellaneous)"],"isi":1,"issue":"10","language":[{"iso":"eng"}],"article_number":"2182","title":"First and second sound in two-dimensional bosonic and fermionic superfluids","author":[{"first_name":"Luca","last_name":"Salasnich","full_name":"Salasnich, Luca"},{"id":"9d13b3cb-30a2-11eb-80dc-f772505e8660","orcid":"0000-0001-6110-2359","full_name":"Cappellaro, Alberto","last_name":"Cappellaro","first_name":"Alberto"},{"full_name":"Furutani, Koichiro","first_name":"Koichiro","last_name":"Furutani"},{"full_name":"Tononi, Andrea","last_name":"Tononi","first_name":"Andrea"},{"full_name":"Bighin, Giacomo","id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8823-9777","last_name":"Bighin","first_name":"Giacomo"}],"file":[{"access_level":"open_access","date_created":"2023-01-24T10:56:12Z","checksum":"9b6bd0e484834dd76d7b26e3c5fba8bd","file_id":"12361","date_updated":"2023-01-24T10:56:12Z","creator":"dernst","file_size":843723,"relation":"main_file","content_type":"application/pdf","file_name":"2022_Symmetry_Salsnich.pdf","success":1}],"day":"17","publication":"Symmetry","tmp":{"legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","short":"CC BY (4.0)"},"article_type":"original","article_processing_charge":"Yes","scopus_import":"1","user_id":"3E5EF7F0-F248-11E8-B48F-1D18A9856A87","publisher":"MDPI","department":[{"_id":"MiLe"}],"ddc":["530"],"date_published":"2022-10-17T00:00:00Z","publication_status":"published","oa":1,"has_accepted_license":"1","intvolume":"        14","citation":{"apa":"Salasnich, L., Cappellaro, A., Furutani, K., Tononi, A., &#38; Bighin, G. (2022). First and second sound in two-dimensional bosonic and fermionic superfluids. <i>Symmetry</i>. MDPI. <a href=\"https://doi.org/10.3390/sym14102182\">https://doi.org/10.3390/sym14102182</a>","mla":"Salasnich, Luca, et al. “First and Second Sound in Two-Dimensional Bosonic and Fermionic Superfluids.” <i>Symmetry</i>, vol. 14, no. 10, 2182, MDPI, 2022, doi:<a href=\"https://doi.org/10.3390/sym14102182\">10.3390/sym14102182</a>.","ista":"Salasnich L, Cappellaro A, Furutani K, Tononi A, Bighin G. 2022. First and second sound in two-dimensional bosonic and fermionic superfluids. Symmetry. 14(10), 2182.","ama":"Salasnich L, Cappellaro A, Furutani K, Tononi A, Bighin G. First and second sound in two-dimensional bosonic and fermionic superfluids. <i>Symmetry</i>. 2022;14(10). doi:<a href=\"https://doi.org/10.3390/sym14102182\">10.3390/sym14102182</a>","short":"L. Salasnich, A. Cappellaro, K. Furutani, A. Tononi, G. Bighin, Symmetry 14 (2022).","chicago":"Salasnich, Luca, Alberto Cappellaro, Koichiro Furutani, Andrea Tononi, and Giacomo Bighin. “First and Second Sound in Two-Dimensional Bosonic and Fermionic Superfluids.” <i>Symmetry</i>. MDPI, 2022. <a href=\"https://doi.org/10.3390/sym14102182\">https://doi.org/10.3390/sym14102182</a>.","ieee":"L. Salasnich, A. Cappellaro, K. Furutani, A. Tononi, and G. Bighin, “First and second sound in two-dimensional bosonic and fermionic superfluids,” <i>Symmetry</i>, vol. 14, no. 10. MDPI, 2022."},"external_id":{"isi":["000875039200001"]},"status":"public","volume":14,"date_created":"2023-01-12T12:08:31Z","file_date_updated":"2023-01-24T10:56:12Z","month":"10","type":"journal_article","oa_version":"Published Version","date_updated":"2023-08-09T10:13:17Z","abstract":[{"text":"We review our theoretical results of the sound propagation in two-dimensional (2D) systems of ultracold fermionic and bosonic atoms. In the superfluid phase, characterized by the spontaneous symmetry breaking of the U(1) symmetry, there is the coexistence of first and second sound. In the case of weakly-interacting repulsive bosons, we model the recent measurements of the sound velocities of 39K atoms in 2D obtained in the weakly-interacting regime and around the Berezinskii–Kosterlitz–Thouless (BKT) superfluid-to-normal transition temperature. In particular, we perform a quite accurate computation of the superfluid density and show that it is reasonably consistent with the experimental results. For superfluid attractive fermions, we calculate the first and second sound velocities across the whole BCS-BEC crossover. In the low-temperature regime, we reproduce the recent measurements of first-sound speed with 6Li atoms. We also predict that there is mixing between sound modes only in the finite-temperature BEC regime.","lang":"eng"}],"_id":"12154","acknowledgement":"This research is partially supported by University of Padova, BIRD grant “Ultracold atoms\r\nin curved geometries”. KF is supported by Fondazione CARIPARO with a PhD fellowship. AT is\r\npartially supported by French National Research Agency ANR Grant Droplets N. ANR-19-CE30-0003-02. LS thanks Herwig Ott and Sandro Wimberger for their kind invitation to the\r\nInternational Workshop “Quantum Transport with ultracold atoms” (2022).","year":"2022"},{"issue":"6","language":[{"iso":"eng"}],"isi":1,"publication_identifier":{"issn":["24699926"],"eissn":["24699934"]},"quality_controlled":"1","doi":"10.1103/PhysRevA.103.L061303","department":[{"_id":"MiLe"}],"user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","publisher":"American Physical Society","article_type":"letter_note","article_processing_charge":"No","scopus_import":"1","publication":"Physical Review A","day":"01","author":[{"full_name":"Tononi, A.","first_name":"A.","last_name":"Tononi"},{"first_name":"Alberto","last_name":"Cappellaro","full_name":"Cappellaro, Alberto","id":"9d13b3cb-30a2-11eb-80dc-f772505e8660","orcid":"0000-0001-6110-2359"},{"id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8823-9777","full_name":"Bighin, Giacomo","last_name":"Bighin","first_name":"Giacomo"},{"first_name":"L.","last_name":"Salasnich","full_name":"Salasnich, L."}],"article_number":"L061303","arxiv":1,"title":"Propagation of first and second sound in a two-dimensional Fermi superfluid","external_id":{"isi":["000662296700014"],"arxiv":["2009.06491"]},"status":"public","citation":{"ista":"Tononi A, Cappellaro A, Bighin G, Salasnich L. 2021. Propagation of first and second sound in a two-dimensional Fermi superfluid. Physical Review A. 103(6), L061303.","mla":"Tononi, A., et al. “Propagation of First and Second Sound in a Two-Dimensional Fermi Superfluid.” <i>Physical Review A</i>, vol. 103, no. 6, L061303, American Physical Society, 2021, doi:<a href=\"https://doi.org/10.1103/PhysRevA.103.L061303\">10.1103/PhysRevA.103.L061303</a>.","apa":"Tononi, A., Cappellaro, A., Bighin, G., &#38; Salasnich, L. (2021). Propagation of first and second sound in a two-dimensional Fermi superfluid. <i>Physical Review A</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevA.103.L061303\">https://doi.org/10.1103/PhysRevA.103.L061303</a>","ama":"Tononi A, Cappellaro A, Bighin G, Salasnich L. Propagation of first and second sound in a two-dimensional Fermi superfluid. <i>Physical Review A</i>. 2021;103(6). doi:<a href=\"https://doi.org/10.1103/PhysRevA.103.L061303\">10.1103/PhysRevA.103.L061303</a>","short":"A. Tononi, A. Cappellaro, G. Bighin, L. Salasnich, Physical Review A 103 (2021).","ieee":"A. Tononi, A. Cappellaro, G. Bighin, and L. Salasnich, “Propagation of first and second sound in a two-dimensional Fermi superfluid,” <i>Physical Review A</i>, vol. 103, no. 6. American Physical Society, 2021.","chicago":"Tononi, A., Alberto Cappellaro, Giacomo Bighin, and L. Salasnich. “Propagation of First and Second Sound in a Two-Dimensional Fermi Superfluid.” <i>Physical Review A</i>. American Physical Society, 2021. <a href=\"https://doi.org/10.1103/PhysRevA.103.L061303\">https://doi.org/10.1103/PhysRevA.103.L061303</a>."},"intvolume":"       103","publication_status":"published","oa":1,"main_file_link":[{"url":"https://arxiv.org/abs/2009.06491","open_access":"1"}],"date_published":"2021-06-01T00:00:00Z","year":"2021","acknowledgement":"G.B. acknowledges support from the Austrian Science Fund (FWF), under Project No. M2641-N27. This work was\r\npartially supported by the University of Padua, BIRD project “Superfluid properties of Fermi gases in optical potentials.”\r\nThe authors thank Miki Ota, Tomoki Ozawa, Sandro Stringari, Tilman Enss, Hauke Biss, Henning Moritz, and Nicolò Defenu for fruitful discussions. The authors thank Henning Moritz and Markus Bohlen for providing their experimental\r\ndata.","_id":"9606","oa_version":"Preprint","month":"06","type":"journal_article","abstract":[{"lang":"eng","text":"Sound propagation is a macroscopic manifestation of the interplay between the equilibrium thermodynamics and the dynamical transport properties of fluids. Here, for a two-dimensional system of ultracold fermions, we calculate the first and second sound velocities across the whole BCS-BEC crossover, and we analyze the system response to an external perturbation. In the low-temperature regime we reproduce the recent measurements [Phys. Rev. Lett. 124, 240403 (2020)] of the first sound velocity, which, due to the decoupling of density and entropy fluctuations, is the sole mode excited by a density probe. Conversely, a heat perturbation excites only the second sound, which, being sensitive to the superfluid depletion, vanishes in the deep BCS regime and jumps discontinuously to zero at the Berezinskii-Kosterlitz-Thouless superfluid transition. A mixing between the modes occurs only in the finite-temperature BEC regime, where our theory converges to the purely bosonic results."}],"date_updated":"2023-08-10T13:37:25Z","date_created":"2021-06-27T22:01:49Z","volume":103}]