Coherence and entanglement in a two-qubit system

Quantum entanglement is a physical resource, associated with the peculiar nonclassical correlations that are possible between separated quantum systems. Entanglement can be measured, transformed, and purified. A pair of quantum systems in an entangled state can be used as a quantum information chann...

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Detalles Bibliográficos
Autor: Hernández-Gaete, Maritza Lisette
Tipo de recurso: tesis doctoral
Estado:Versión publicada
Fecha de publicación:2009
País:Chile
Idioma:inglés
OAI Identifier:oai:repositorio.anid.cl:10533/179772
Acceso en línea:http://creativecommons.org/licenses/by-nc-nd/3.0/cl/
https://hdl.handle.net/10533/179772
Access Level:acceso abierto
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spelling Pontificia Universidad Católica de ChileHernández-Gaete, Maritza Lisette2009https://hdl.handle.net/10533/179772http://purl.org/coar/access_right/c_abf2Coherence and entanglement in a two-qubit systemOrszag, MiguelPontificia Universidad Católica de ChilechiSantiagoHernández-Gaete, Maritza Lisette2017-03-27T20:37:11Z2022-08-22T21:19:22Z2017-03-27T20:37:11Z2022-08-22T21:19:22Z20092009Quantum entanglement is a physical resource, associated with the peculiar nonclassical correlations that are possible between separated quantum systems. Entanglement can be measured, transformed, and purified. A pair of quantum systems in an entangled state can be used as a quantum information channel to perform computational and cryptographic tasks that are impossible for classical systems. The aim of this work is to study various aspects of quantum entanglement and coherence, illustrated by several examples. We relate the concepts of decoherence and disentanglement, via a model of two two-level atoms in different types of reservoir, including both cases of independent and common bath. Finally, we relate decoherence and disentanglement, by focussing on the sudden death of the entanglement and the dependence of the death time with the "distance" of our initial condition, from the decoherence free subspace. In particular, we study the sudden death of the entanglement, in a two-atom system with a common reservoir.PFCHA-BecasDoctor en Física118p.PFCHA-BecasTERMINADAhttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/https://hdl.handle.net/10533/179772enginstname: Conicytreponame: Repositorio Digital RI2.0instname: Conicytreponame: Repositorio Digital RI2.0handle/10533/108040info:eu-repo/grantAgreement/PFCHA-Becas/RI20info:eu-repo/semantics/dataset/hdl.handle.net/10533/93488Atribución-NoComercial-SinDerivadas 3.0 Chileinfo:eu-repo/semantics/openAccessCoherence and entanglement in a two-qubit systemTesis Doctoradoinfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/publishedVersionTesisTesishttps://hdl.handle.net/10533/179772PFCHA-BecasORIGINALHERNANDEZ_MARITZA_952D.pdfapplication/pdf34974198https://repositorio.anid.cl/bitstreams/985ce4a7-53cb-4e56-9832-ffc293910473/download8c5761e2db574ab5ed39e251244add2cMD51TEXTHERNANDEZ_MARITZA_952D.pdf.txtExtracted texttext/plain152362https://repositorio.anid.cl/bitstreams/6503705f-172c-4842-8a05-d29780c0b664/download6890ddc5738ec6f0394d696587b4ccf2MD52THUMBNAILHERNANDEZ_MARITZA_952D.pdf.jpgIM Thumbnailimage/jpeg2144https://repositorio.anid.cl/bitstreams/7c3ec58e-246e-4b07-b66e-db42a324a76d/download398747fbfd7353bb51bd26ed2dd7a290MD5310533/179772oai:repositorio.anid.cl:10533/1797722023-07-24 17:58:18.044https://repositorio.anid.clRepositorio ANIDaletelier@anid.cl
dc.title.none.fl_str_mv Coherence and entanglement in a two-qubit system
title Coherence and entanglement in a two-qubit system
spellingShingle Coherence and entanglement in a two-qubit system
Hernández-Gaete, Maritza Lisette
title_short Coherence and entanglement in a two-qubit system
title_full Coherence and entanglement in a two-qubit system
title_fullStr Coherence and entanglement in a two-qubit system
title_full_unstemmed Coherence and entanglement in a two-qubit system
title_sort Coherence and entanglement in a two-qubit system
dc.creator.none.fl_str_mv Hernández-Gaete, Maritza Lisette
author Hernández-Gaete, Maritza Lisette
author_facet Hernández-Gaete, Maritza Lisette
author_role author
dc.contributor.advisor.none.fl_str_mv Orszag, Miguel
dc.contributor.institution.none.fl_str_mv Pontificia Universidad Católica de Chile
description Quantum entanglement is a physical resource, associated with the peculiar nonclassical correlations that are possible between separated quantum systems. Entanglement can be measured, transformed, and purified. A pair of quantum systems in an entangled state can be used as a quantum information channel to perform computational and cryptographic tasks that are impossible for classical systems. The aim of this work is to study various aspects of quantum entanglement and coherence, illustrated by several examples. We relate the concepts of decoherence and disentanglement, via a model of two two-level atoms in different types of reservoir, including both cases of independent and common bath. Finally, we relate decoherence and disentanglement, by focussing on the sudden death of the entanglement and the dependence of the death time with the "distance" of our initial condition, from the decoherence free subspace. In particular, we study the sudden death of the entanglement, in a two-atom system with a common reservoir.
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2022-08-22T21:19:22Z
dc.date.available.none.fl_str_mv 2017-03-27T20:37:11Z
2022-08-22T21:19:22Z
dc.type.none.fl_str_mv Tesis Doctorado
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