Dipolar condensates confined in a toroidal trap: Ground state and vortices

Autores
Abad, M.; Guilleumas, M.; Mayol, R.; Pi, M.; Jezek, Dora Marta
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We study a Bose-Einstein condensate of Cr52 atoms confined in a toroidal trap with a variable strength of s-wave contact interactions. We analyze the effects of the anisotropic nature of the dipolar interaction by considering the magnetization axis to be perpendicular to the trap symmetry axis. In the absence of a central repulsive barrier, when the trap is purely harmonic, the effect of reducing the scattering length is a tuning of the geometry of the system from a pancake-shaped condensate when it is large to a cigar-shaped condensate for small scattering lengths. For a condensate in a toroidal trap, the interaction in combination with the central repulsive Gaussian barrier produces an azimuthal dependence of the particle density for a fixed radial distance. We find that along the magnetization direction the density decreases as the scattering length is reduced but presents two symmetric density peaks in the perpendicular axis. For even lower values of the scattering length we observe that the system undergoes a dipolar-induced symmetry breaking phenomenon. The whole density becomes concentrated in one of the peaks, resembling an origin-displaced cigar-shaped condensate. In this context we also analyze stationary vortex states and their associated velocity fields, finding that these also show a strong azimuthal dependence for small scattering lengths. The expectation value of the angular momentum along the z direction provides a qualitative measure of the difference between the velocity in the different density peaks. © 2010 The American Physical Society.
Fil: Abad, M.. Universidad de Barcelona; España
Fil: Guilleumas, M.. Universidad de Barcelona; España
Fil: Mayol, R.. Universidad de Barcelona; España
Fil: Pi, M.. Universidad de Barcelona; España
Fil: Jezek, Dora Marta. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
Materia
Dipolar Condensate
Toroidal Trap
Vortices
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/59082
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/59082
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Dipolar condensates confined in a toroidal trap: Ground state and vorticesAbad, M.Guilleumas, M.Mayol, R.Pi, M.Jezek, Dora MartaDipolar CondensateToroidal TrapVorticeshttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We study a Bose-Einstein condensate of Cr52 atoms confined in a toroidal trap with a variable strength of s-wave contact interactions. We analyze the effects of the anisotropic nature of the dipolar interaction by considering the magnetization axis to be perpendicular to the trap symmetry axis. In the absence of a central repulsive barrier, when the trap is purely harmonic, the effect of reducing the scattering length is a tuning of the geometry of the system from a pancake-shaped condensate when it is large to a cigar-shaped condensate for small scattering lengths. For a condensate in a toroidal trap, the interaction in combination with the central repulsive Gaussian barrier produces an azimuthal dependence of the particle density for a fixed radial distance. We find that along the magnetization direction the density decreases as the scattering length is reduced but presents two symmetric density peaks in the perpendicular axis. For even lower values of the scattering length we observe that the system undergoes a dipolar-induced symmetry breaking phenomenon. The whole density becomes concentrated in one of the peaks, resembling an origin-displaced cigar-shaped condensate. In this context we also analyze stationary vortex states and their associated velocity fields, finding that these also show a strong azimuthal dependence for small scattering lengths. The expectation value of the angular momentum along the z direction provides a qualitative measure of the difference between the velocity in the different density peaks. © 2010 The American Physical Society.Fil: Abad, M.. Universidad de Barcelona; EspañaFil: Guilleumas, M.. Universidad de Barcelona; EspañaFil: Mayol, R.. Universidad de Barcelona; EspañaFil: Pi, M.. Universidad de Barcelona; EspañaFil: Jezek, Dora Marta. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; ArgentinaAmerican Physical Society2010-04info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/59082Abad, M.; Guilleumas, M.; Mayol, R.; Pi, M.; Jezek, Dora Marta; Dipolar condensates confined in a toroidal trap: Ground state and vortices; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 81; 4; 4-2010; 436191-4361981050-2947CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.81.043619info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:56:04Zoai:ri.conicet.gov.ar:11336/59082instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:56:04.961CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Dipolar condensates confined in a toroidal trap: Ground state and vortices
title Dipolar condensates confined in a toroidal trap: Ground state and vortices
spellingShingle Dipolar condensates confined in a toroidal trap: Ground state and vortices
Abad, M.
Dipolar Condensate
Toroidal Trap
Vortices
title_short Dipolar condensates confined in a toroidal trap: Ground state and vortices
title_full Dipolar condensates confined in a toroidal trap: Ground state and vortices
title_fullStr Dipolar condensates confined in a toroidal trap: Ground state and vortices
title_full_unstemmed Dipolar condensates confined in a toroidal trap: Ground state and vortices
title_sort Dipolar condensates confined in a toroidal trap: Ground state and vortices
dc.creator.none.fl_str_mv Abad, M.
Guilleumas, M.
Mayol, R.
Pi, M.
Jezek, Dora Marta
author Abad, M.
author_facet Abad, M.
Guilleumas, M.
Mayol, R.
Pi, M.
Jezek, Dora Marta
author_role author
author2 Guilleumas, M.
Mayol, R.
Pi, M.
Jezek, Dora Marta
author2_role author
author
author
author
dc.subject.none.fl_str_mv Dipolar Condensate
Toroidal Trap
Vortices
topic Dipolar Condensate
Toroidal Trap
Vortices
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We study a Bose-Einstein condensate of Cr52 atoms confined in a toroidal trap with a variable strength of s-wave contact interactions. We analyze the effects of the anisotropic nature of the dipolar interaction by considering the magnetization axis to be perpendicular to the trap symmetry axis. In the absence of a central repulsive barrier, when the trap is purely harmonic, the effect of reducing the scattering length is a tuning of the geometry of the system from a pancake-shaped condensate when it is large to a cigar-shaped condensate for small scattering lengths. For a condensate in a toroidal trap, the interaction in combination with the central repulsive Gaussian barrier produces an azimuthal dependence of the particle density for a fixed radial distance. We find that along the magnetization direction the density decreases as the scattering length is reduced but presents two symmetric density peaks in the perpendicular axis. For even lower values of the scattering length we observe that the system undergoes a dipolar-induced symmetry breaking phenomenon. The whole density becomes concentrated in one of the peaks, resembling an origin-displaced cigar-shaped condensate. In this context we also analyze stationary vortex states and their associated velocity fields, finding that these also show a strong azimuthal dependence for small scattering lengths. The expectation value of the angular momentum along the z direction provides a qualitative measure of the difference between the velocity in the different density peaks. © 2010 The American Physical Society.
Fil: Abad, M.. Universidad de Barcelona; España
Fil: Guilleumas, M.. Universidad de Barcelona; España
Fil: Mayol, R.. Universidad de Barcelona; España
Fil: Pi, M.. Universidad de Barcelona; España
Fil: Jezek, Dora Marta. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina
description We study a Bose-Einstein condensate of Cr52 atoms confined in a toroidal trap with a variable strength of s-wave contact interactions. We analyze the effects of the anisotropic nature of the dipolar interaction by considering the magnetization axis to be perpendicular to the trap symmetry axis. In the absence of a central repulsive barrier, when the trap is purely harmonic, the effect of reducing the scattering length is a tuning of the geometry of the system from a pancake-shaped condensate when it is large to a cigar-shaped condensate for small scattering lengths. For a condensate in a toroidal trap, the interaction in combination with the central repulsive Gaussian barrier produces an azimuthal dependence of the particle density for a fixed radial distance. We find that along the magnetization direction the density decreases as the scattering length is reduced but presents two symmetric density peaks in the perpendicular axis. For even lower values of the scattering length we observe that the system undergoes a dipolar-induced symmetry breaking phenomenon. The whole density becomes concentrated in one of the peaks, resembling an origin-displaced cigar-shaped condensate. In this context we also analyze stationary vortex states and their associated velocity fields, finding that these also show a strong azimuthal dependence for small scattering lengths. The expectation value of the angular momentum along the z direction provides a qualitative measure of the difference between the velocity in the different density peaks. © 2010 The American Physical Society.
publishDate 2010
dc.date.none.fl_str_mv 2010-04
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/59082
Abad, M.; Guilleumas, M.; Mayol, R.; Pi, M.; Jezek, Dora Marta; Dipolar condensates confined in a toroidal trap: Ground state and vortices; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 81; 4; 4-2010; 436191-436198
1050-2947
CONICET Digital
CONICET
url http://hdl.handle.net/11336/59082
identifier_str_mv Abad, M.; Guilleumas, M.; Mayol, R.; Pi, M.; Jezek, Dora Marta; Dipolar condensates confined in a toroidal trap: Ground state and vortices; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 81; 4; 4-2010; 436191-436198
1050-2947
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.81.043619
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
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:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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