Extracting Information from Qubit-Environment Correlations
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1038/srep07443 http://hdl.handle.net/11449/116849 |
Resumo: | Most works on open quantum systems generally focus on the reduced physical system by tracing out the environment degrees of freedom. Here we show that the qubit distributions with the environment are essential for a thorough analysis, and demonstrate that the way that quantum correlations are distributed in a quantum register is constrained by the way in which each subsystem gets correlated with the environment. For a two-qubit system coupled to a common dissipative environment epsilon, we show how to optimise interqubit correlations and entanglement via a quantification of the qubit-environment information flow, in a process that, perhaps surprisingly, does not rely on the knowledge of the state of the environment. To illustrate our findings, we consider an optically-driven bipartite interacting qubit AB system under the action of epsilon. By tailoring the light-matter interaction, a relationship between the qubits early stage disentanglement and the qubit-environment entanglement distribution is found. We also show that, under suitable initial conditions, the qubits energy asymmetry allows the identification of physical scenarios whereby qubit-qubit entanglement minima coincide with the extrema of the A epsilon and B epsilon entanglement oscillations. |
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Repositório Institucional da UNESP |
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Extracting Information from Qubit-Environment CorrelationsMost works on open quantum systems generally focus on the reduced physical system by tracing out the environment degrees of freedom. Here we show that the qubit distributions with the environment are essential for a thorough analysis, and demonstrate that the way that quantum correlations are distributed in a quantum register is constrained by the way in which each subsystem gets correlated with the environment. For a two-qubit system coupled to a common dissipative environment epsilon, we show how to optimise interqubit correlations and entanglement via a quantification of the qubit-environment information flow, in a process that, perhaps surprisingly, does not rely on the knowledge of the state of the environment. To illustrate our findings, we consider an optically-driven bipartite interacting qubit AB system under the action of epsilon. By tailoring the light-matter interaction, a relationship between the qubits early stage disentanglement and the qubit-environment entanglement distribution is found. We also show that, under suitable initial conditions, the qubits energy asymmetry allows the identification of physical scenarios whereby qubit-qubit entanglement minima coincide with the extrema of the A epsilon and B epsilon entanglement oscillations.Universidad del ValleScience, Technology and Innovation Fund-General Royalties System (FCTeI-SGR)COLCIENCIASNational Institute for Science and Technology of Quantum Information (INCT-IQ)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Valle, Dept Fis, Cali 25360, ColombiaCtr Bioinformat & Photon CIBioFI, Cali, ColombiaUNESP, Fac Ciencias, Dept Fis, BR-17033360 Bauru, SP, BrazilUNESP, Fac Ciencias, Dept Fis, BR-17033360 Bauru, SP, BrazilUniversidad del ValleCI 7930Science, Technology and Innovation Fund-General Royalties System (FCTeI-SGR)BPIN 2013000100007National Institute for Science and Technology of Quantum Information (INCT-IQ)2008/57856-6CNPq: 474592/2013-8FAPESP: 12/50464-0Nature Publishing GroupUniv ValleCtr Bioinformat & Photon CIBioFIUniversidade Estadual Paulista (Unesp)Reina, John H.Susa, Cristian E.Fanchini, Felipe Fernandes [UNESP]2015-03-18T15:54:16Z2015-03-18T15:54:16Z2014-12-17info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article7application/pdfhttp://dx.doi.org/10.1038/srep07443Scientific Reports. London: Nature Publishing Group, v. 4, 7 p., 2014.2045-2322http://hdl.handle.net/11449/11684910.1038/srep07443WOS:000346403500001WOS000346403500001.pdf88848904721934740000-0003-3297-905XWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengScientific Reports4.1221,533info:eu-repo/semantics/openAccess2024-04-25T17:39:39Zoai:repositorio.unesp.br:11449/116849Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T15:58:40.175584Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Extracting Information from Qubit-Environment Correlations |
title |
Extracting Information from Qubit-Environment Correlations |
spellingShingle |
Extracting Information from Qubit-Environment Correlations Reina, John H. |
title_short |
Extracting Information from Qubit-Environment Correlations |
title_full |
Extracting Information from Qubit-Environment Correlations |
title_fullStr |
Extracting Information from Qubit-Environment Correlations |
title_full_unstemmed |
Extracting Information from Qubit-Environment Correlations |
title_sort |
Extracting Information from Qubit-Environment Correlations |
author |
Reina, John H. |
author_facet |
Reina, John H. Susa, Cristian E. Fanchini, Felipe Fernandes [UNESP] |
author_role |
author |
author2 |
Susa, Cristian E. Fanchini, Felipe Fernandes [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Univ Valle Ctr Bioinformat & Photon CIBioFI Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Reina, John H. Susa, Cristian E. Fanchini, Felipe Fernandes [UNESP] |
description |
Most works on open quantum systems generally focus on the reduced physical system by tracing out the environment degrees of freedom. Here we show that the qubit distributions with the environment are essential for a thorough analysis, and demonstrate that the way that quantum correlations are distributed in a quantum register is constrained by the way in which each subsystem gets correlated with the environment. For a two-qubit system coupled to a common dissipative environment epsilon, we show how to optimise interqubit correlations and entanglement via a quantification of the qubit-environment information flow, in a process that, perhaps surprisingly, does not rely on the knowledge of the state of the environment. To illustrate our findings, we consider an optically-driven bipartite interacting qubit AB system under the action of epsilon. By tailoring the light-matter interaction, a relationship between the qubits early stage disentanglement and the qubit-environment entanglement distribution is found. We also show that, under suitable initial conditions, the qubits energy asymmetry allows the identification of physical scenarios whereby qubit-qubit entanglement minima coincide with the extrema of the A epsilon and B epsilon entanglement oscillations. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-12-17 2015-03-18T15:54:16Z 2015-03-18T15:54:16Z |
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/10.1038/srep07443 Scientific Reports. London: Nature Publishing Group, v. 4, 7 p., 2014. 2045-2322 http://hdl.handle.net/11449/116849 10.1038/srep07443 WOS:000346403500001 WOS000346403500001.pdf 8884890472193474 0000-0003-3297-905X |
url |
http://dx.doi.org/10.1038/srep07443 http://hdl.handle.net/11449/116849 |
identifier_str_mv |
Scientific Reports. London: Nature Publishing Group, v. 4, 7 p., 2014. 2045-2322 10.1038/srep07443 WOS:000346403500001 WOS000346403500001.pdf 8884890472193474 0000-0003-3297-905X |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Scientific Reports 4.122 1,533 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
7 application/pdf |
dc.publisher.none.fl_str_mv |
Nature Publishing Group |
publisher.none.fl_str_mv |
Nature Publishing Group |
dc.source.none.fl_str_mv |
Web of Science 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_ |
1808128588992479232 |