Phase-space approach to the study of decoherence in quantum walks

Autores
Lopez, Cecilia Carolina; Paz, Juan Pablo
Año de publicación
2003
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We analyze the quantum walk on a cycle using discrete Wigner functions as a way to represent the states and the evolution of the walker. The method provides some insight on the nature of the interference effects that make quantum and classical walks different. We also study the behavior of the system when the quantum coin carried by the walker interacts with an environment. We show that for this system quantum coherence is robust for initially delocalized states of the walker. The use of phase-space representation enables us to develop an intuitive description of the nature of the decoherence process in this system.
Fil: Lopez, Cecilia Carolina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina
Fil: Paz, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Los Alamos National High Magnetic Field Laboratory; Estados Unidos
Materia
Decoherence
Quantum Walks
Phase Space
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/71992
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Phase-space approach to the study of decoherence in quantum walksLopez, Cecilia CarolinaPaz, Juan PabloDecoherenceQuantum WalksPhase Spacehttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We analyze the quantum walk on a cycle using discrete Wigner functions as a way to represent the states and the evolution of the walker. The method provides some insight on the nature of the interference effects that make quantum and classical walks different. We also study the behavior of the system when the quantum coin carried by the walker interacts with an environment. We show that for this system quantum coherence is robust for initially delocalized states of the walker. The use of phase-space representation enables us to develop an intuitive description of the nature of the decoherence process in this system.Fil: Lopez, Cecilia Carolina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; ArgentinaFil: Paz, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Los Alamos National High Magnetic Field Laboratory; Estados UnidosAmerican Physical Society2003-11info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/71992Lopez, Cecilia Carolina; Paz, Juan Pablo; Phase-space approach to the study of decoherence in quantum walks; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 68; 5; 11-2003; 1-9; 523051050-2947CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/pra/abstract/10.1103/PhysRevA.68.052305info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/quant-ph/0308104info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.68.052305info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:11:52Zoai:ri.conicet.gov.ar:11336/71992instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:11:52.756CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Phase-space approach to the study of decoherence in quantum walks
title Phase-space approach to the study of decoherence in quantum walks
spellingShingle Phase-space approach to the study of decoherence in quantum walks
Lopez, Cecilia Carolina
Decoherence
Quantum Walks
Phase Space
title_short Phase-space approach to the study of decoherence in quantum walks
title_full Phase-space approach to the study of decoherence in quantum walks
title_fullStr Phase-space approach to the study of decoherence in quantum walks
title_full_unstemmed Phase-space approach to the study of decoherence in quantum walks
title_sort Phase-space approach to the study of decoherence in quantum walks
dc.creator.none.fl_str_mv Lopez, Cecilia Carolina
Paz, Juan Pablo
author Lopez, Cecilia Carolina
author_facet Lopez, Cecilia Carolina
Paz, Juan Pablo
author_role author
author2 Paz, Juan Pablo
author2_role author
dc.subject.none.fl_str_mv Decoherence
Quantum Walks
Phase Space
topic Decoherence
Quantum Walks
Phase Space
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We analyze the quantum walk on a cycle using discrete Wigner functions as a way to represent the states and the evolution of the walker. The method provides some insight on the nature of the interference effects that make quantum and classical walks different. We also study the behavior of the system when the quantum coin carried by the walker interacts with an environment. We show that for this system quantum coherence is robust for initially delocalized states of the walker. The use of phase-space representation enables us to develop an intuitive description of the nature of the decoherence process in this system.
Fil: Lopez, Cecilia Carolina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Física; Argentina
Fil: Paz, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina. Los Alamos National High Magnetic Field Laboratory; Estados Unidos
description We analyze the quantum walk on a cycle using discrete Wigner functions as a way to represent the states and the evolution of the walker. The method provides some insight on the nature of the interference effects that make quantum and classical walks different. We also study the behavior of the system when the quantum coin carried by the walker interacts with an environment. We show that for this system quantum coherence is robust for initially delocalized states of the walker. The use of phase-space representation enables us to develop an intuitive description of the nature of the decoherence process in this system.
publishDate 2003
dc.date.none.fl_str_mv 2003-11
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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://hdl.handle.net/11336/71992
Lopez, Cecilia Carolina; Paz, Juan Pablo; Phase-space approach to the study of decoherence in quantum walks; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 68; 5; 11-2003; 1-9; 52305
1050-2947
CONICET Digital
CONICET
url http://hdl.handle.net/11336/71992
identifier_str_mv Lopez, Cecilia Carolina; Paz, Juan Pablo; Phase-space approach to the study of decoherence in quantum walks; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 68; 5; 11-2003; 1-9; 52305
1050-2947
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://journals.aps.org/pra/abstract/10.1103/PhysRevA.68.052305
info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/quant-ph/0308104
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.68.052305
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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