Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach

We study thermal properties of a trapped Bose-Bose mixture in a dilute regime using quantum Monte Carlo methods. Our main aim is to investigate the dependence of the superfluid density and the condensate fraction on temperature for the mixed and separated phases. To this end we use the diffusion Mon...

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Detalles Bibliográficos
Autores: Dželalija, K., Cikojevic, V., Boronat Medico, Jordi|||0000-0002-0273-3457, Vranješ Markic, Leandra
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/341866
Acceso en línea:https://hdl.handle.net/2117/341866
https://dx.doi.org/10.1103/PhysRevA.102.063304
Access Level:acceso abierto
Palabra clave:Superfluidity
Bose-Einstein condensation
Monte Carlo method
Bose gases
Superfluid density
Ultracold gases
Quantum Monte Carlo
Superfluïdesa
Condensació de Bose-Einstein
Montecarlo, Mètode de
Àrees temàtiques de la UPC::Física
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spelling Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approachDželalija, K.Cikojevic, V.Boronat Medico, Jordi|||0000-0002-0273-3457Vranješ Markic, LeandraSuperfluidityBose-Einstein condensationMonte Carlo methodBose gasesSuperfluid densityUltracold gasesQuantum Monte CarloSuperfluïdesaCondensació de Bose-EinsteinMontecarlo, Mètode deÀrees temàtiques de la UPC::FísicaWe study thermal properties of a trapped Bose-Bose mixture in a dilute regime using quantum Monte Carlo methods. Our main aim is to investigate the dependence of the superfluid density and the condensate fraction on temperature for the mixed and separated phases. To this end we use the diffusion Monte Carlo method in the zero-temperature limit and the path-integral Monte Carlo method for finite temperatures. The results obtained are compared with solutions of the coupled Gross-Pitaevskii equations for the mixture at zero temperature. We notice the existence of an anisotropic superfluid density in some phase-separated mixtures. Our results also show that the temperature evolution of the superfluid density and condensate fraction is slightly different, showing noteworthy situations where the superfluid fraction is smaller than the condensate fraction.American Physical Society20202020-12-0420212021-03-17journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/341866https://dx.doi.org/10.1103/PhysRevA.102.063304reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/3418662026-05-27T15:37:01Z
dc.title.none.fl_str_mv Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach
title Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach
spellingShingle Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach
Dželalija, K.
Superfluidity
Bose-Einstein condensation
Monte Carlo method
Bose gases
Superfluid density
Ultracold gases
Quantum Monte Carlo
Superfluïdesa
Condensació de Bose-Einstein
Montecarlo, Mètode de
Àrees temàtiques de la UPC::Física
title_short Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach
title_full Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach
title_fullStr Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach
title_full_unstemmed Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach
title_sort Trapped Bose-Bose mixtures at finite temperature: a quantum Monte Carlo approach
dc.creator.none.fl_str_mv Dželalija, K.
Cikojevic, V.
Boronat Medico, Jordi|||0000-0002-0273-3457
Vranješ Markic, Leandra
author Dželalija, K.
author_facet Dželalija, K.
Cikojevic, V.
Boronat Medico, Jordi|||0000-0002-0273-3457
Vranješ Markic, Leandra
author_role author
author2 Cikojevic, V.
Boronat Medico, Jordi|||0000-0002-0273-3457
Vranješ Markic, Leandra
author2_role author
author
author
dc.subject.none.fl_str_mv Superfluidity
Bose-Einstein condensation
Monte Carlo method
Bose gases
Superfluid density
Ultracold gases
Quantum Monte Carlo
Superfluïdesa
Condensació de Bose-Einstein
Montecarlo, Mètode de
Àrees temàtiques de la UPC::Física
topic Superfluidity
Bose-Einstein condensation
Monte Carlo method
Bose gases
Superfluid density
Ultracold gases
Quantum Monte Carlo
Superfluïdesa
Condensació de Bose-Einstein
Montecarlo, Mètode de
Àrees temàtiques de la UPC::Física
description We study thermal properties of a trapped Bose-Bose mixture in a dilute regime using quantum Monte Carlo methods. Our main aim is to investigate the dependence of the superfluid density and the condensate fraction on temperature for the mixed and separated phases. To this end we use the diffusion Monte Carlo method in the zero-temperature limit and the path-integral Monte Carlo method for finite temperatures. The results obtained are compared with solutions of the coupled Gross-Pitaevskii equations for the mixture at zero temperature. We notice the existence of an anisotropic superfluid density in some phase-separated mixtures. Our results also show that the temperature evolution of the superfluid density and condensate fraction is slightly different, showing noteworthy situations where the superfluid fraction is smaller than the condensate fraction.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-12-04
2021
2021-03-17
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/341866
https://dx.doi.org/10.1103/PhysRevA.102.063304
url https://hdl.handle.net/2117/341866
https://dx.doi.org/10.1103/PhysRevA.102.063304
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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