Global thermal entanglement in n-qubit systems
- Autores
- Rossignoli, Raúl Dante; Canosa, Norma Beatriz
- Año de publicación
- 2005
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- We examine the entanglement of thermal states of n spins interacting through different types of XY couplings in the presence of a uniform magnetic field, by evaluating the negativities of all possible bipartite partitions of the whole system and of subsystems. We consider both the case where every qubit interacts with all others and where just nearest neighbors interact in a one-dimensional chain. Limit temperatures for nonzero negativities are also evaluated and compared with the mean field critical temperature. It is shown that limit temperatures of global negativities are strictly independent of the magnetic field in all XXZ models, in spite of the quantum transitions that these models may exhibit at zero temperature, while in anisotropic models they always increase for sufficiently large fields. Results also show that these temperatures are higher than those limiting pairwise entanglement.
Facultad de Ciencias Exactas - Materia
-
Ciencias Exactas
Física
Physics
Thermal entanglement
Uniform magnetic field
Limit temperatures - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/125845
Ver los metadatos del registro completo
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Global thermal entanglement in n-qubit systemsRossignoli, Raúl DanteCanosa, Norma BeatrizCiencias ExactasFísicaPhysicsThermal entanglementUniform magnetic fieldLimit temperaturesWe examine the entanglement of thermal states of n spins interacting through different types of XY couplings in the presence of a uniform magnetic field, by evaluating the negativities of all possible bipartite partitions of the whole system and of subsystems. We consider both the case where every qubit interacts with all others and where just nearest neighbors interact in a one-dimensional chain. Limit temperatures for nonzero negativities are also evaluated and compared with the mean field critical temperature. It is shown that limit temperatures of global negativities are strictly independent of the magnetic field in all XXZ models, in spite of the quantum transitions that these models may exhibit at zero temperature, while in anisotropic models they always increase for sufficiently large fields. Results also show that these temperatures are higher than those limiting pairwise entanglement.Facultad de Ciencias Exactas2005-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/125845enginfo:eu-repo/semantics/altIdentifier/issn/1050-2947info:eu-repo/semantics/altIdentifier/issn/1094-1622info:eu-repo/semantics/altIdentifier/arxiv/1312.7370info:eu-repo/semantics/altIdentifier/doi/10.1103/physreva.72.012335info: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:UNLP2025-09-29T11:30:18Zoai:sedici.unlp.edu.ar:10915/125845Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:30:19.178SEDICI (UNLP) - Universidad Nacional de La Platafalse |
dc.title.none.fl_str_mv |
Global thermal entanglement in n-qubit systems |
title |
Global thermal entanglement in n-qubit systems |
spellingShingle |
Global thermal entanglement in n-qubit systems Rossignoli, Raúl Dante Ciencias Exactas Física Physics Thermal entanglement Uniform magnetic field Limit temperatures |
title_short |
Global thermal entanglement in n-qubit systems |
title_full |
Global thermal entanglement in n-qubit systems |
title_fullStr |
Global thermal entanglement in n-qubit systems |
title_full_unstemmed |
Global thermal entanglement in n-qubit systems |
title_sort |
Global thermal entanglement in n-qubit systems |
dc.creator.none.fl_str_mv |
Rossignoli, Raúl Dante Canosa, Norma Beatriz |
author |
Rossignoli, Raúl Dante |
author_facet |
Rossignoli, Raúl Dante Canosa, Norma Beatriz |
author_role |
author |
author2 |
Canosa, Norma Beatriz |
author2_role |
author |
dc.subject.none.fl_str_mv |
Ciencias Exactas Física Physics Thermal entanglement Uniform magnetic field Limit temperatures |
topic |
Ciencias Exactas Física Physics Thermal entanglement Uniform magnetic field Limit temperatures |
dc.description.none.fl_txt_mv |
We examine the entanglement of thermal states of n spins interacting through different types of XY couplings in the presence of a uniform magnetic field, by evaluating the negativities of all possible bipartite partitions of the whole system and of subsystems. We consider both the case where every qubit interacts with all others and where just nearest neighbors interact in a one-dimensional chain. Limit temperatures for nonzero negativities are also evaluated and compared with the mean field critical temperature. It is shown that limit temperatures of global negativities are strictly independent of the magnetic field in all XXZ models, in spite of the quantum transitions that these models may exhibit at zero temperature, while in anisotropic models they always increase for sufficiently large fields. Results also show that these temperatures are higher than those limiting pairwise entanglement. Facultad de Ciencias Exactas |
description |
We examine the entanglement of thermal states of n spins interacting through different types of XY couplings in the presence of a uniform magnetic field, by evaluating the negativities of all possible bipartite partitions of the whole system and of subsystems. We consider both the case where every qubit interacts with all others and where just nearest neighbors interact in a one-dimensional chain. Limit temperatures for nonzero negativities are also evaluated and compared with the mean field critical temperature. It is shown that limit temperatures of global negativities are strictly independent of the magnetic field in all XXZ models, in spite of the quantum transitions that these models may exhibit at zero temperature, while in anisotropic models they always increase for sufficiently large fields. Results also show that these temperatures are higher than those limiting pairwise entanglement. |
publishDate |
2005 |
dc.date.none.fl_str_mv |
2005-07 |
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/10915/125845 |
url |
http://sedici.unlp.edu.ar/handle/10915/125845 |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/issn/1050-2947 info:eu-repo/semantics/altIdentifier/issn/1094-1622 info:eu-repo/semantics/altIdentifier/arxiv/1312.7370 info:eu-repo/semantics/altIdentifier/doi/10.1103/physreva.72.012335 |
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 |
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