Pair entanglement in dimerized spin-<i>s</i> chains

Autores
Boette, Alan Pablo; Rossignoli, Raúl Dante; Canosa, Norma Beatriz; Matera, Juan Mauricio
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We examine the pair entanglement in the ground state of finite dimerized spin-s chains interacting through anisotropic XY couplings immersed in a transverse magnetic field by means of a self-consistent pair mean-field approximation. The approach, which makes no a priori assumptions on the pair states, predicts, for sufficiently low coupling between pairs, 2s distinct dimerized phases for increasing fields below the pair factorizing field, separated by spin-parity-breaking phases. The dimerized phases lead to approximate magnetization and pair entanglement plateaus, while the parity-breaking phases are characterized by weak pair entanglement but non-negligible entanglement of the pair with the rest of the system. These predictions are confirmed by the exact results obtained in finite s=1 and s=3/2 chains. It is also shown that for increasing values of the spin s, the entanglement of an isolated pair, as measured by the negativity, rapidly saturates in the anisotropic XY case but increases as s1/2 in the XX case, reflecting a distinct single-spin entanglement spectrum.
Instituto de Física La Plata
Materia
Física
Spin systems
Large spin limit
Dimerization
Quantum entanglement
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/96303

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repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Pair entanglement in dimerized spin-<i>s</i> chainsBoette, Alan PabloRossignoli, Raúl DanteCanosa, Norma BeatrizMatera, Juan MauricioFísicaSpin systemsLarge spin limitDimerizationQuantum entanglementWe examine the pair entanglement in the ground state of finite dimerized spin-s chains interacting through anisotropic XY couplings immersed in a transverse magnetic field by means of a self-consistent pair mean-field approximation. The approach, which makes no a priori assumptions on the pair states, predicts, for sufficiently low coupling between pairs, 2s distinct dimerized phases for increasing fields below the pair factorizing field, separated by spin-parity-breaking phases. The dimerized phases lead to approximate magnetization and pair entanglement plateaus, while the parity-breaking phases are characterized by weak pair entanglement but non-negligible entanglement of the pair with the rest of the system. These predictions are confirmed by the exact results obtained in finite s=1 and s=3/2 chains. It is also shown that for increasing values of the spin s, the entanglement of an isolated pair, as measured by the negativity, rapidly saturates in the anisotropic XY case but increases as s1/2 in the XX case, reflecting a distinct single-spin entanglement spectrum.Instituto de Física La Plata2016-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf214403-214403http://sedici.unlp.edu.ar/handle/10915/96303enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/65916info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/pdf/10.1103/PhysRevB.94.214403info:eu-repo/semantics/altIdentifier/issn/2469-9969info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.94.214403info:eu-repo/semantics/altIdentifier/hdl/11336/65916info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:20:20Zoai:sedici.unlp.edu.ar:10915/96303Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:20:21.027SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Pair entanglement in dimerized spin-<i>s</i> chains
title Pair entanglement in dimerized spin-<i>s</i> chains
spellingShingle Pair entanglement in dimerized spin-<i>s</i> chains
Boette, Alan Pablo
Física
Spin systems
Large spin limit
Dimerization
Quantum entanglement
title_short Pair entanglement in dimerized spin-<i>s</i> chains
title_full Pair entanglement in dimerized spin-<i>s</i> chains
title_fullStr Pair entanglement in dimerized spin-<i>s</i> chains
title_full_unstemmed Pair entanglement in dimerized spin-<i>s</i> chains
title_sort Pair entanglement in dimerized spin-<i>s</i> chains
dc.creator.none.fl_str_mv Boette, Alan Pablo
Rossignoli, Raúl Dante
Canosa, Norma Beatriz
Matera, Juan Mauricio
author Boette, Alan Pablo
author_facet Boette, Alan Pablo
Rossignoli, Raúl Dante
Canosa, Norma Beatriz
Matera, Juan Mauricio
author_role author
author2 Rossignoli, Raúl Dante
Canosa, Norma Beatriz
Matera, Juan Mauricio
author2_role author
author
author
dc.subject.none.fl_str_mv Física
Spin systems
Large spin limit
Dimerization
Quantum entanglement
topic Física
Spin systems
Large spin limit
Dimerization
Quantum entanglement
dc.description.none.fl_txt_mv We examine the pair entanglement in the ground state of finite dimerized spin-s chains interacting through anisotropic XY couplings immersed in a transverse magnetic field by means of a self-consistent pair mean-field approximation. The approach, which makes no a priori assumptions on the pair states, predicts, for sufficiently low coupling between pairs, 2s distinct dimerized phases for increasing fields below the pair factorizing field, separated by spin-parity-breaking phases. The dimerized phases lead to approximate magnetization and pair entanglement plateaus, while the parity-breaking phases are characterized by weak pair entanglement but non-negligible entanglement of the pair with the rest of the system. These predictions are confirmed by the exact results obtained in finite s=1 and s=3/2 chains. It is also shown that for increasing values of the spin s, the entanglement of an isolated pair, as measured by the negativity, rapidly saturates in the anisotropic XY case but increases as s1/2 in the XX case, reflecting a distinct single-spin entanglement spectrum.
Instituto de Física La Plata
description We examine the pair entanglement in the ground state of finite dimerized spin-s chains interacting through anisotropic XY couplings immersed in a transverse magnetic field by means of a self-consistent pair mean-field approximation. The approach, which makes no a priori assumptions on the pair states, predicts, for sufficiently low coupling between pairs, 2s distinct dimerized phases for increasing fields below the pair factorizing field, separated by spin-parity-breaking phases. The dimerized phases lead to approximate magnetization and pair entanglement plateaus, while the parity-breaking phases are characterized by weak pair entanglement but non-negligible entanglement of the pair with the rest of the system. These predictions are confirmed by the exact results obtained in finite s=1 and s=3/2 chains. It is also shown that for increasing values of the spin s, the entanglement of an isolated pair, as measured by the negativity, rapidly saturates in the anisotropic XY case but increases as s1/2 in the XX case, reflecting a distinct single-spin entanglement spectrum.
publishDate 2016
dc.date.none.fl_str_mv 2016-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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://sedici.unlp.edu.ar/handle/10915/96303
url http://sedici.unlp.edu.ar/handle/10915/96303
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/65916
info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/prb/pdf/10.1103/PhysRevB.94.214403
info:eu-repo/semantics/altIdentifier/issn/2469-9969
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.94.214403
info:eu-repo/semantics/altIdentifier/hdl/11336/65916
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
214403-214403
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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