Shielding quantum discord through continuous dynamical decoupling
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevA.86.052310 http://hdl.handle.net/11449/219852 |
Resumo: | This work investigates the use of dynamical decoupling to shield quantum discord from errors introduced by the environment. Specifically, a two-qubit system interacting with independent baths of bosons is considered. The initial conditions of the system were chosen as pure and mixed states, while the dynamical decouplingwas achieved by means of continuous fields. The effect of the temperature on the shielding of quantum discord is also studied. It is shown that although the quantum discord for particular initial states may be perfectly preserved over some finite time window in the absence of any protective field, the effectiveness of the dynamical decoupling with continuous fields depends essentially on the time scale required to preserve quantum discord. It is also shown that for these particular initial states the time for which the shielding of the quantum discord becomes effective decreases as the temperature increases. © 2012 American Physical Society. |
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Repositório Institucional da UNESP |
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Shielding quantum discord through continuous dynamical decouplingThis work investigates the use of dynamical decoupling to shield quantum discord from errors introduced by the environment. Specifically, a two-qubit system interacting with independent baths of bosons is considered. The initial conditions of the system were chosen as pure and mixed states, while the dynamical decouplingwas achieved by means of continuous fields. The effect of the temperature on the shielding of quantum discord is also studied. It is shown that although the quantum discord for particular initial states may be perfectly preserved over some finite time window in the absence of any protective field, the effectiveness of the dynamical decoupling with continuous fields depends essentially on the time scale required to preserve quantum discord. It is also shown that for these particular initial states the time for which the shielding of the quantum discord becomes effective decreases as the temperature increases. © 2012 American Physical Society.Faculdade de Ciências UNESP-Universidade Estadual Paulista, Bauru, São Paulo, 17033-360Instituto de Geociências e Ciências Exatas UNESP-Universidade Estadual Paulista, Rio Claro, São Paulo, 13506-900Departamento de Física Universidade Federal de São Carlos, São Carlos, São Paulo, 13565-905Faculdade de Ciências UNESP-Universidade Estadual Paulista, Bauru, São Paulo, 17033-360Instituto de Geociências e Ciências Exatas UNESP-Universidade Estadual Paulista, Rio Claro, São Paulo, 13506-900Universidade Estadual Paulista (UNESP)Universidade Federal de São Carlos (UFSCar)Fanchini, Felipe F. [UNESP]De Lima, Emanuel F. [UNESP]Castelano, Leonardo K.2022-04-28T18:58:05Z2022-04-28T18:58:05Z2012-11-06info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevA.86.052310Physical Review A - Atomic, Molecular, and Optical Physics, v. 86, n. 5, 2012.1050-29471094-1622http://hdl.handle.net/11449/21985210.1103/PhysRevA.86.0523102-s2.0-84869006246Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review A - Atomic, Molecular, and Optical Physics41966info:eu-repo/semantics/openAccess2023-05-17T13:58:32Zoai:repositorio.unesp.br:11449/219852Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:11:54.522200Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Shielding quantum discord through continuous dynamical decoupling |
title |
Shielding quantum discord through continuous dynamical decoupling |
spellingShingle |
Shielding quantum discord through continuous dynamical decoupling Fanchini, Felipe F. [UNESP] |
title_short |
Shielding quantum discord through continuous dynamical decoupling |
title_full |
Shielding quantum discord through continuous dynamical decoupling |
title_fullStr |
Shielding quantum discord through continuous dynamical decoupling |
title_full_unstemmed |
Shielding quantum discord through continuous dynamical decoupling |
title_sort |
Shielding quantum discord through continuous dynamical decoupling |
author |
Fanchini, Felipe F. [UNESP] |
author_facet |
Fanchini, Felipe F. [UNESP] De Lima, Emanuel F. [UNESP] Castelano, Leonardo K. |
author_role |
author |
author2 |
De Lima, Emanuel F. [UNESP] Castelano, Leonardo K. |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidade Federal de São Carlos (UFSCar) |
dc.contributor.author.fl_str_mv |
Fanchini, Felipe F. [UNESP] De Lima, Emanuel F. [UNESP] Castelano, Leonardo K. |
description |
This work investigates the use of dynamical decoupling to shield quantum discord from errors introduced by the environment. Specifically, a two-qubit system interacting with independent baths of bosons is considered. The initial conditions of the system were chosen as pure and mixed states, while the dynamical decouplingwas achieved by means of continuous fields. The effect of the temperature on the shielding of quantum discord is also studied. It is shown that although the quantum discord for particular initial states may be perfectly preserved over some finite time window in the absence of any protective field, the effectiveness of the dynamical decoupling with continuous fields depends essentially on the time scale required to preserve quantum discord. It is also shown that for these particular initial states the time for which the shielding of the quantum discord becomes effective decreases as the temperature increases. © 2012 American Physical Society. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-11-06 2022-04-28T18:58:05Z 2022-04-28T18:58:05Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevA.86.052310 Physical Review A - Atomic, Molecular, and Optical Physics, v. 86, n. 5, 2012. 1050-2947 1094-1622 http://hdl.handle.net/11449/219852 10.1103/PhysRevA.86.052310 2-s2.0-84869006246 |
url |
http://dx.doi.org/10.1103/PhysRevA.86.052310 http://hdl.handle.net/11449/219852 |
identifier_str_mv |
Physical Review A - Atomic, Molecular, and Optical Physics, v. 86, n. 5, 2012. 1050-2947 1094-1622 10.1103/PhysRevA.86.052310 2-s2.0-84869006246 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review A - Atomic, Molecular, and Optical Physics 41966 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129403693039616 |