{"id":"https://openalex.org/W4225757813","doi":"https://doi.org/10.1103/physrevlett.128.223601","title":"First and Second Sound in a Compressible 3D Bose Fluid","display_name":"First and Second Sound in a Compressible 3D Bose Fluid","publication_year":2022,"publication_date":"2022-06-02","ids":{"openalex":"https://openalex.org/W4225757813","doi":"https://doi.org/10.1103/physrevlett.128.223601","pmid":"https://pubmed.ncbi.nlm.nih.gov/35714252"},"language":"en","primary_location":{"id":"doi:10.1103/physrevlett.128.223601","doi":"https://doi.org/10.1103/physrevlett.128.223601","is_oa":false,"landing_page_url":"https://doi.org/10.1103/physrevlett.128.223601","pdf_url":null,"source":{"id":"https://openalex.org/S24807848","display_name":"Physical Review Letters","issn_l":"0031-9007","issn":["0031-9007","1079-7114","1092-0145"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","jufo-3","ki-jl-2","medline","norway-2","poland-200","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320261","host_organization_name":"American Physical Society","host_organization_lineage":["https://openalex.org/P4310320261"],"host_organization_lineage_names":["American Physical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical Review Letters","raw_type":"journal-article"},"volume":null,"type":"article","indexed_in":["arxiv","crossref","datacite","pubmed"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2112.14763","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5009832385","display_name":"Timon Hilker","orcid":"https://orcid.org/0000-0002-1012-5750","observed_orcids":["https://orcid.org/0000-0002-1012-5750"]},"institutions":[{"id":"https://openalex.org/I241749","display_name":"University of Cambridge","ror":"https://ror.org/013meh722","country_code":"GB","type":"education","lineage":["https://openalex.org/I241749"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Timon A. Hilker","raw_affiliation_strings":["Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom"],"raw_orcid":"https://orcid.org/0000-0002-1012-5750","affiliations":[{"raw_affiliation_string":"Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom","institution_ids":["https://openalex.org/I241749"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5047761132","display_name":"Lena Hannah Dogra","orcid":"https://orcid.org/0000-0003-4901-7615","observed_orcids":["https://orcid.org/0000-0003-4901-7615"]},"institutions":[{"id":"https://openalex.org/I241749","display_name":"University of Cambridge","ror":"https://ror.org/013meh722","country_code":"GB","type":"education","lineage":["https://openalex.org/I241749"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Lena H. Dogra","raw_affiliation_strings":["Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom"],"raw_orcid":"https://orcid.org/0000-0003-4901-7615","affiliations":[{"raw_affiliation_string":"Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom","institution_ids":["https://openalex.org/I241749"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5026970667","display_name":"Christoph Eigen","orcid":"https://orcid.org/0000-0001-5298-7482","observed_orcids":["https://orcid.org/0000-0001-5298-7482"]},"institutions":[{"id":"https://openalex.org/I241749","display_name":"University of Cambridge","ror":"https://ror.org/013meh722","country_code":"GB","type":"education","lineage":["https://openalex.org/I241749"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Christoph Eigen","raw_affiliation_strings":["Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom"],"raw_orcid":"https://orcid.org/0000-0001-5298-7482","affiliations":[{"raw_affiliation_string":"Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom","institution_ids":["https://openalex.org/I241749"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5072338308","display_name":"Jake Glidden","orcid":"https://orcid.org/0000-0001-6241-5162","observed_orcids":["https://orcid.org/0000-0001-6241-5162"]},"institutions":[{"id":"https://openalex.org/I241749","display_name":"University of Cambridge","ror":"https://ror.org/013meh722","country_code":"GB","type":"education","lineage":["https://openalex.org/I241749"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Jake A.\u2009P. Glidden","raw_affiliation_strings":["Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom"],"raw_orcid":"https://orcid.org/0000-0001-6241-5162","affiliations":[{"raw_affiliation_string":"Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom","institution_ids":["https://openalex.org/I241749"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5088822397","display_name":"Robert P. Smith","orcid":"https://orcid.org/0000-0002-6881-5690","observed_orcids":["https://orcid.org/0000-0002-6881-5690"]},"institutions":[{"id":"https://openalex.org/I40120149","display_name":"University of Oxford","ror":"https://ror.org/052gg0110","country_code":"GB","type":"education","lineage":["https://openalex.org/I40120149"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Robert P. Smith","raw_affiliation_strings":["Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom"],"raw_orcid":"https://orcid.org/0000-0002-6881-5690","affiliations":[{"raw_affiliation_string":"Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom","institution_ids":["https://openalex.org/I40120149"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5010052434","display_name":"Zoran Hadzibabic","orcid":"https://orcid.org/0000-0002-0118-9285","observed_orcids":["https://orcid.org/0000-0002-0118-9285"]},"institutions":[{"id":"https://openalex.org/I241749","display_name":"University of Cambridge","ror":"https://ror.org/013meh722","country_code":"GB","type":"education","lineage":["https://openalex.org/I241749"]}],"countries":["GB"],"is_corresponding":false,"raw_author_name":"Zoran Hadzibabic","raw_affiliation_strings":["Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom"],"raw_orcid":"https://orcid.org/0000-0002-0118-9285","affiliations":[{"raw_affiliation_string":"Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, United Kingdom","institution_ids":["https://openalex.org/I241749"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":2,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":3750,"currency":"USD","value_usd":3750},"apc_paid":null,"fwci":1.4182,"has_fulltext":false,"cited_by_count":16,"citation_normalized_percentile":{"value":0.80796324,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":89,"max":98},"biblio":{"volume":"128","issue":"22","first_page":"223601","last_page":"223601"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10425","display_name":"Cold Atom Physics and Bose-Einstein Condensates","score":0.9901999831199646,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10425","display_name":"Cold Atom Physics and Bose-Einstein Condensates","score":0.9901999831199646,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11965","display_name":"Quantum, superfluid, helium dynamics","score":0.009200000204145908,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T12612","display_name":"Strong Light-Matter Interactions","score":0.00019999999494757503,"subfield":{"id":"https://openalex.org/subfields/3107","display_name":"Atomic and Molecular Physics, and Optics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/first-sound","display_name":"first sound","score":0.972000002861023},{"id":"https://openalex.org/keywords/second-sound","display_name":"second sound","score":1.0},{"id":"https://openalex.org/keywords/two-fluid-model","display_name":"two-fluid model","score":0.7549999952316284},{"id":"https://openalex.org/keywords/superfluidity","display_name":"superfluidity","score":0.8320000171661377},{"id":"https://openalex.org/keywords/bose-gas","display_name":"Bose gas","score":0.5950000286102295},{"id":"https://openalex.org/keywords/density-waves","display_name":"density waves","score":0.7850000262260437},{"id":"https://openalex.org/keywords/entropy-waves","display_name":"entropy waves","score":0.9750000238418579},{"id":"https://openalex.org/keywords/hydrodynamic-theory","display_name":"hydrodynamic theory","score":0.6970000267028809},{"id":"https://openalex.org/keywords/collisionless-regime","display_name":"collisionless regime","score":0.6230000257492065}],"concepts":[{"id":"https://openalex.org/C25536358","wikidata":"https://www.wikidata.org/wiki/Q106667","display_name":"Superfluidity","level":2,"score":0.8327656984329224},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.785902738571167},{"id":"https://openalex.org/C84655787","wikidata":"https://www.wikidata.org/wiki/Q8067817","display_name":"Compressibility","level":2,"score":0.6804808378219604},{"id":"https://openalex.org/C31686786","wikidata":"https://www.wikidata.org/wiki/Q233699","display_name":"Second sound","level":3,"score":0.6765758395195007},{"id":"https://openalex.org/C1855228","wikidata":"https://www.wikidata.org/wiki/Q1203476","display_name":"Liquid helium","level":3,"score":0.5893720388412476},{"id":"https://openalex.org/C204514805","wikidata":"https://www.wikidata.org/wiki/Q1143503","display_name":"Bose gas","level":3,"score":0.532797634601593},{"id":"https://openalex.org/C17816496","wikidata":"https://www.wikidata.org/wiki/Q7269050","display_name":"Quantum fluid","level":3,"score":0.5265327095985413},{"id":"https://openalex.org/C85867844","wikidata":"https://www.wikidata.org/wiki/Q1072904","display_name":"Fermi gas","level":3,"score":0.5188699960708618},{"id":"https://openalex.org/C122507166","wikidata":"https://www.wikidata.org/wiki/Q628906","display_name":"Crossover","level":2,"score":0.509262204170227},{"id":"https://openalex.org/C186769553","wikidata":"https://www.wikidata.org/wiki/Q726648","display_name":"Fermi Gamma-ray Space Telescope","level":2,"score":0.49295806884765625},{"id":"https://openalex.org/C49024897","wikidata":"https://www.wikidata.org/wiki/Q7643352","display_name":"Superfluid helium-4","level":3,"score":0.45628413558006287},{"id":"https://openalex.org/C200351514","wikidata":"https://www.wikidata.org/wiki/Q124003","display_name":"Speed of sound","level":2,"score":0.4550446569919586},{"id":"https://openalex.org/C2777838768","wikidata":"https://www.wikidata.org/wiki/Q4327976","display_name":"Zero sound","level":4,"score":0.45017313957214355},{"id":"https://openalex.org/C26873012","wikidata":"https://www.wikidata.org/wiki/Q214781","display_name":"Condensed matter physics","level":1,"score":0.4400772452354431},{"id":"https://openalex.org/C204530211","wikidata":"https://www.wikidata.org/wiki/Q752823","display_name":"Thermal","level":2,"score":0.41814807057380676},{"id":"https://openalex.org/C37589322","wikidata":"https://www.wikidata.org/wiki/Q46202","display_name":"Bose\u2013Einstein condensate","level":2,"score":0.41619035601615906},{"id":"https://openalex.org/C51675196","wikidata":"https://www.wikidata.org/wiki/Q1890239","display_name":"Fermi liquid theory","level":3,"score":0.34472280740737915},{"id":"https://openalex.org/C546029482","wikidata":"https://www.wikidata.org/wiki/Q560","display_name":"Helium","level":2,"score":0.2918354868888855},{"id":"https://openalex.org/C203718221","wikidata":"https://www.wikidata.org/wiki/Q491713","display_name":"Sound (geography)","level":2,"score":0.2669258713722229},{"id":"https://openalex.org/C57879066","wikidata":"https://www.wikidata.org/wiki/Q41217","display_name":"Mechanics","level":1,"score":0.263054221868515},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.25512778759002686},{"id":"https://openalex.org/C54101563","wikidata":"https://www.wikidata.org/wiki/Q124131","display_name":"Superconductivity","level":2,"score":0.1626303791999817},{"id":"https://openalex.org/C97355855","wikidata":"https://www.wikidata.org/wiki/Q11473","display_name":"Thermodynamics","level":1,"score":0.1610477864742279},{"id":"https://openalex.org/C41008148","wikidata":"https://www.wikidata.org/wiki/Q21198","display_name":"Computer science","level":0,"score":0.0},{"id":"https://openalex.org/C147120987","wikidata":"https://www.wikidata.org/wiki/Q2225","display_name":"Electron","level":2,"score":0.0},{"id":"https://openalex.org/C24890656","wikidata":"https://www.wikidata.org/wiki/Q82811","display_name":"Acoustics","level":1,"score":0.0},{"id":"https://openalex.org/C154945302","wikidata":"https://www.wikidata.org/wiki/Q11660","display_name":"Artificial intelligence","level":1,"score":0.0}],"mesh":[],"locations_count":4,"locations":[{"id":"doi:10.1103/physrevlett.128.223601","doi":"https://doi.org/10.1103/physrevlett.128.223601","is_oa":false,"landing_page_url":"https://doi.org/10.1103/physrevlett.128.223601","pdf_url":null,"source":{"id":"https://openalex.org/S24807848","display_name":"Physical Review Letters","issn_l":"0031-9007","issn":["0031-9007","1079-7114","1092-0145"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","dongbi-a","jufo-3","ki-jl-2","medline","norway-2","poland-200","russia-white-list-1","vabb-shw"],"host_organization":"https://openalex.org/P4310320261","host_organization_name":"American Physical Society","host_organization_lineage":["https://openalex.org/P4310320261"],"host_organization_lineage_names":["American Physical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical Review Letters","raw_type":"journal-article"},{"id":"pmid:35714252","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/35714252","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical review letters","raw_type":"Journal Article"},{"id":"pmh:oai:arXiv.org:2112.14763","doi":null,"is_oa":true,"landing_page_url":"http://arxiv.org/abs/2112.14763","pdf_url":"https://arxiv.org/pdf/2112.14763","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"doi:10.48550/arxiv.2112.14763","doi":"https://doi.org/10.48550/arxiv.2112.14763","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2112.14763","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"article-journal"}],"best_oa_location":{"id":"pmh:oai:arXiv.org:2112.14763","doi":null,"is_oa":true,"landing_page_url":"http://arxiv.org/abs/2112.14763","pdf_url":"https://arxiv.org/pdf/2112.14763","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[],"study_designs":[],"awards":[{"id":"https://openalex.org/G1977481951","display_name":"Phase Transitions and Non-equilibrium Dynamics in Homogeneous Quantum Gases","funder_award_id":"EP/N011759/1","funder_id":"https://openalex.org/F4320334627","funder_display_name":"Engineering and Physical Sciences Research Council"},{"id":"https://openalex.org/G1983034516","display_name":"NAQUAS: Non-equilibrium dynamics in Atomic systems for QUAntum Simulation.","funder_award_id":"EP/R043396/1","funder_id":"https://openalex.org/F4320334627","funder_display_name":"Engineering and Physical Sciences Research Council"},{"id":"https://openalex.org/G2887104535","display_name":null,"funder_award_id":"MSCA-IF-2018 840081","funder_id":"https://openalex.org/F4320338337","funder_display_name":"H2020 Marie Sk\u0142odowska-Curie Actions"},{"id":"https://openalex.org/G3939404591","display_name":"Designing Out-of-Equilibrium Many-Body Quantum Systems","funder_award_id":"EP/P009565/1","funder_id":"https://openalex.org/F4320334627","funder_display_name":"Engineering and Physical Sciences Research Council"},{"id":"https://openalex.org/G4101610855","display_name":"Non-equilibrium dynamics in Atomic systems fo QUantum Simulation","funder_award_id":"ANR-18-QUAN-0002","funder_id":"https://openalex.org/F4320320883","funder_display_name":"Agence Nationale de la Recherche"},{"id":"https://openalex.org/G8753739443","display_name":null,"funder_award_id":"1948697","funder_id":"https://openalex.org/F4320334627","funder_display_name":"Engineering and Physical Sciences Research Council"}],"funders":[{"id":"https://openalex.org/F4320320006","display_name":"Royal Society","ror":"https://ror.org/03wnrjx87"},{"id":"https://openalex.org/F4320320883","display_name":"Agence Nationale de la Recherche","ror":"https://ror.org/00rbzpz17"},{"id":"https://openalex.org/F4320330828","display_name":"QuantERA","ror":null},{"id":"https://openalex.org/F4320334627","display_name":"Engineering and Physical Sciences Research Council","ror":"https://ror.org/0439y7842"},{"id":"https://openalex.org/F4320334653","display_name":"Jesus College, University of Cambridge","ror":"https://ror.org/013meh722"},{"id":"https://openalex.org/F4320338335","display_name":"H2020 European Research Council","ror":"https://ror.org/0472cxd90"},{"id":"https://openalex.org/F4320338337","display_name":"H2020 Marie Sk\u0142odowska-Curie Actions","ror":null}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":50,"referenced_works":["https://openalex.org/W211937708","https://openalex.org/W231625903","https://openalex.org/W1595744325","https://openalex.org/W1775151221","https://openalex.org/W1798265499","https://openalex.org/W1967827306","https://openalex.org/W1979319438","https://openalex.org/W1980084358","https://openalex.org/W1988735629","https://openalex.org/W1989503476","https://openalex.org/W1992021403","https://openalex.org/W1995689107","https://openalex.org/W1995842083","https://openalex.org/W1997126908","https://openalex.org/W2000690963","https://openalex.org/W2011948620","https://openalex.org/W2024340062","https://openalex.org/W2043824501","https://openalex.org/W2075701224","https://openalex.org/W2082043333","https://openalex.org/W2084653022","https://openalex.org/W2085102252","https://openalex.org/W2087052607","https://openalex.org/W2127945721","https://openalex.org/W2148366453","https://openalex.org/W2197034439","https://openalex.org/W2318727879","https://openalex.org/W2324535796","https://openalex.org/W2507759049","https://openalex.org/W2510321600","https://openalex.org/W2511723332","https://openalex.org/W2621740575","https://openalex.org/W2796626391","https://openalex.org/W2802685151","https://openalex.org/W2940296202","https://openalex.org/W2955808229","https://openalex.org/W2971903030","https://openalex.org/W2978126139","https://openalex.org/W3010471793","https://openalex.org/W3019012827","https://openalex.org/W3048966389","https://openalex.org/W3105018673","https://openalex.org/W3110196264","https://openalex.org/W3202501360","https://openalex.org/W3216519720","https://openalex.org/W4200032897","https://openalex.org/W4205336138","https://openalex.org/W4248898649","https://openalex.org/W4250488500","https://openalex.org/W6963028306"],"related_works":["https://openalex.org/W2000690963","https://openalex.org/W2100619964","https://openalex.org/W6946267153","https://openalex.org/W4287599263","https://openalex.org/W2181039665","https://openalex.org/W2045384494","https://openalex.org/W2796626391","https://openalex.org/W6906810018","https://openalex.org/W1482789839","https://openalex.org/W4306760883"],"abstract_inverted_index":{"The":[0],"two-fluid":[1],"model":[2],"is":[3],"fundamental":[4],"for":[5],"the":[6,11,41,45,66,80,99,118,123],"description":[7],"of":[8,48,69,83],"superfluidity.":[9],"In":[10,90],"nearly":[12],"incompressible":[13],"liquid":[14,32],"regime,":[15],"it":[16],"successfully":[17],"describes":[18],"first":[19,103],"and":[20,27,34,73,104,114],"second":[21,105],"sound,":[22],"corresponding,":[23],"respectively,":[24,112],"to":[25,127],"density":[26,108],"entropy":[28],"waves,":[29],"in":[30,44,59,130],"both":[31],"helium":[33],"unitary":[35],"Fermi":[36],"gases.":[37],"Here,":[38],"we":[39,95,121],"study":[40],"two":[42,75],"sounds":[43],"opposite":[46],"regime":[47],"a":[49,60,91,131],"highly":[50],"compressible":[51],"fluid,":[52],"using":[53],"an":[54],"ultracold":[55],"^{39}K":[56],"Bose":[57],"gas":[58],"three-dimensional":[61],"box":[62],"trap.":[63],"We":[64],"excite":[65],"longest-wavelength":[67],"mode":[68],"our":[70],"homogeneous":[71],"gas,":[72],"observe":[74],"distinct":[76],"resonant":[77],"oscillations":[78,109],"below":[79],"critical":[81],"temperature,":[82],"which":[84],"only":[85],"one":[86],"persists":[87],"above":[88],"it.":[89],"microscopic":[92],"mode-structure":[93],"analysis,":[94],"find":[96],"agreement":[97],"with":[98],"hydrodynamic":[100,126],"theory,":[101],"where":[102],"sound":[106],"involve":[107],"dominated":[110],"by,":[111],"thermal":[113],"condensed":[115],"atoms.":[116],"Varying":[117],"interaction":[119],"strength,":[120],"explore":[122],"crossover":[124],"from":[125],"collisionless":[128],"behavior":[129],"normal":[132],"gas.":[133]},"counts_by_year":[{"year":2026,"cited_by_count":2},{"year":2025,"cited_by_count":4},{"year":2024,"cited_by_count":5},{"year":2023,"cited_by_count":1},{"year":2022,"cited_by_count":4}],"updated_date":"2026-11-03T10:50:19.383937","created_date":"2022-05-05T00:00:00"}
