Tunneling vortex dynamics in linearly coupled Bose-Hybbard rings

The quantum dynamics of population-balanced fractional vortices and population-imbalanced vortices in an effective two-state bosonic system, made of two coupled discrete circuits with few sites, is addressed within the Bose-Hubbard model. We show that, for low on-site interaction, the tunneling of q...

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Detalles Bibliográficos
Autores: Escrivà, Albert, Muñoz Mateo, Antonio, Guilleumas, Montserrat, Juliá-Díaz, Bruno
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/148458
Acceso en línea:https://hdl.handle.net/2445/148458
Access Level:acceso abierto
Palabra clave:Vòrtexs
Superfluïdesa
Condensació de Bose-Einstein
Vortex-motion
Superfluidity
Bose-Einstein condensation
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spelling Tunneling vortex dynamics in linearly coupled Bose-Hybbard ringsEscrivà, AlbertMuñoz Mateo, AntonioGuilleumas, MontserratJuliá-Díaz, BrunoVòrtexsSuperfluïdesaCondensació de Bose-EinsteinVortex-motionSuperfluidityBose-Einstein condensationThe quantum dynamics of population-balanced fractional vortices and population-imbalanced vortices in an effective two-state bosonic system, made of two coupled discrete circuits with few sites, is addressed within the Bose-Hubbard model. We show that, for low on-site interaction, the tunneling of quantized vortices between the rings performs a coherent, oscillating dynamics connecting current states with chiral symmetry. The vortex-flux transfer dually follows the usual sinusoidal particle current of the Josephson effect, in good agreement with a mean-field approximation. Within such a regime, the switch of persistent currents in the rings resembles flux-qubit features and is feasible for experimental realization. On the contrary, strong interatomic interactions suppress the chiral current and lead the system into fragmented condensation.American Physical Society2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/148458Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1103/PhysRevA.100.063621Physical Review A, 2019, vol. 100, p. 063621https://doi.org/10.1103/PhysRevA.100.063621(c) American Physical Society, 2019info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1484582026-05-27T06:46:51Z
dc.title.none.fl_str_mv Tunneling vortex dynamics in linearly coupled Bose-Hybbard rings
title Tunneling vortex dynamics in linearly coupled Bose-Hybbard rings
spellingShingle Tunneling vortex dynamics in linearly coupled Bose-Hybbard rings
Escrivà, Albert
Vòrtexs
Superfluïdesa
Condensació de Bose-Einstein
Vortex-motion
Superfluidity
Bose-Einstein condensation
title_short Tunneling vortex dynamics in linearly coupled Bose-Hybbard rings
title_full Tunneling vortex dynamics in linearly coupled Bose-Hybbard rings
title_fullStr Tunneling vortex dynamics in linearly coupled Bose-Hybbard rings
title_full_unstemmed Tunneling vortex dynamics in linearly coupled Bose-Hybbard rings
title_sort Tunneling vortex dynamics in linearly coupled Bose-Hybbard rings
dc.creator.none.fl_str_mv Escrivà, Albert
Muñoz Mateo, Antonio
Guilleumas, Montserrat
Juliá-Díaz, Bruno
author Escrivà, Albert
author_facet Escrivà, Albert
Muñoz Mateo, Antonio
Guilleumas, Montserrat
Juliá-Díaz, Bruno
author_role author
author2 Muñoz Mateo, Antonio
Guilleumas, Montserrat
Juliá-Díaz, Bruno
author2_role author
author
author
dc.subject.none.fl_str_mv Vòrtexs
Superfluïdesa
Condensació de Bose-Einstein
Vortex-motion
Superfluidity
Bose-Einstein condensation
topic Vòrtexs
Superfluïdesa
Condensació de Bose-Einstein
Vortex-motion
Superfluidity
Bose-Einstein condensation
description The quantum dynamics of population-balanced fractional vortices and population-imbalanced vortices in an effective two-state bosonic system, made of two coupled discrete circuits with few sites, is addressed within the Bose-Hubbard model. We show that, for low on-site interaction, the tunneling of quantized vortices between the rings performs a coherent, oscillating dynamics connecting current states with chiral symmetry. The vortex-flux transfer dually follows the usual sinusoidal particle current of the Josephson effect, in good agreement with a mean-field approximation. Within such a regime, the switch of persistent currents in the rings resembles flux-qubit features and is feasible for experimental realization. On the contrary, strong interatomic interactions suppress the chiral current and lead the system into fragmented condensation.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/148458
url https://hdl.handle.net/2445/148458
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1103/PhysRevA.100.063621
Physical Review A, 2019, vol. 100, p. 063621
https://doi.org/10.1103/PhysRevA.100.063621
dc.rights.none.fl_str_mv (c) American Physical Society, 2019
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 2019
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 Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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