Measurements, quantum discord, and parity in spin-1 systems

We consider the evaluation of the quantum discord and other related measures of quantum correlations in a system formed by a spin-1 and a complementary spin system. A characterization of general projective measurements in such system in terms of spin averages is thereby introduced, which allows one...

Full description

Bibliographic Details
Authors: Rossignoli, Raúl Dante, Matera, Juan Mauricio, Canosa, Norma Beatriz
Format: article
Status:Published version
Publication Date:2012
Country:Argentina
Institution:Universidad Nacional de La Plata
Repository:SEDICI (UNLP)
Language:English
OAI Identifier:oai:sedici.unlp.edu.ar:10915/96150
Online Access:http://sedici.unlp.edu.ar/handle/10915/96150
Access Level:Open access
Keyword:Física
Ciencias Exactas
Quantum discord
Quantum correlations
Spin
id AR_96ab7abd8a4f7787c412ec7846fbc913
oai_identifier_str oai:sedici.unlp.edu.ar:10915/96150
network_acronym_str AR
network_name_str Argentina
repository_id_str
spelling Measurements, quantum discord, and parity in spin-1 systemsRossignoli, Raúl DanteMatera, Juan MauricioCanosa, Norma BeatrizFísicaCiencias ExactasQuantum discordQuantum correlationsSpinWe consider the evaluation of the quantum discord and other related measures of quantum correlations in a system formed by a spin-1 and a complementary spin system. A characterization of general projective measurements in such system in terms of spin averages is thereby introduced, which allows one to easily visualize their deviation from standard spin measurements. It is shown that the measurement optimizing these measures corresponds in general to a nonspin measurement. The important case of states that commute with the total S<sub>z</sub> spin-parity is discussed in detail, and the general stationary measurements for such states (parity preserving measurements) are identified. Numerical and analytical results for the quantum discord, the geometric discord, and the one way information deficit in the relevant case of a mixture of two aligned spin-1 states are also presented.Instituto de Física La Plata2012-08-03info: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/10915/96150enginfo:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/74656info:eu-repo/semantics/altIdentifier/issn/1050-2947info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.86.022104info:eu-repo/semantics/altIdentifier/hdl/11336/74656info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/2.5/ar/Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Argentina (CC BY-NC-SA 2.5)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2024-05-08T12:58:17Zoai:sedici.unlp.edu.ar:10915/96150Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292024-05-08 12:58:17.897SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Measurements, quantum discord, and parity in spin-1 systems
title Measurements, quantum discord, and parity in spin-1 systems
spellingShingle Measurements, quantum discord, and parity in spin-1 systems
Rossignoli, Raúl Dante
Física
Ciencias Exactas
Quantum discord
Quantum correlations
Spin
title_short Measurements, quantum discord, and parity in spin-1 systems
title_full Measurements, quantum discord, and parity in spin-1 systems
title_fullStr Measurements, quantum discord, and parity in spin-1 systems
title_full_unstemmed Measurements, quantum discord, and parity in spin-1 systems
title_sort Measurements, quantum discord, and parity in spin-1 systems
dc.creator.none.fl_str_mv Rossignoli, Raúl Dante
Matera, Juan Mauricio
Canosa, Norma Beatriz
author Rossignoli, Raúl Dante
author_facet Rossignoli, Raúl Dante
Matera, Juan Mauricio
Canosa, Norma Beatriz
author_role author
author2 Matera, Juan Mauricio
Canosa, Norma Beatriz
author2_role author
author
dc.subject.none.fl_str_mv Física
Ciencias Exactas
Quantum discord
Quantum correlations
Spin
topic Física
Ciencias Exactas
Quantum discord
Quantum correlations
Spin
description We consider the evaluation of the quantum discord and other related measures of quantum correlations in a system formed by a spin-1 and a complementary spin system. A characterization of general projective measurements in such system in terms of spin averages is thereby introduced, which allows one to easily visualize their deviation from standard spin measurements. It is shown that the measurement optimizing these measures corresponds in general to a nonspin measurement. The important case of states that commute with the total S<sub>z</sub> spin-parity is discussed in detail, and the general stationary measurements for such states (parity preserving measurements) are identified. Numerical and analytical results for the quantum discord, the geometric discord, and the one way information deficit in the relevant case of a mixture of two aligned spin-1 states are also presented.
publishDate 2012
dc.date.none.fl_str_mv 2012-08-03
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/10915/96150
url http://sedici.unlp.edu.ar/handle/10915/96150
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://ri.conicet.gov.ar/11336/74656
info:eu-repo/semantics/altIdentifier/issn/1050-2947
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevA.86.022104
info:eu-repo/semantics/altIdentifier/hdl/11336/74656
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Argentina (CC BY-NC-SA 2.5)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Argentina (CC BY-NC-SA 2.5)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
_version_ 1799194274677391360
score 15.811543

Similar Items