Discord and information deficit in the XX chain

cic.isFulltexttruees
cic.isPeerReviewedtruees
cic.lugarDesarrolloUniversidad Nacional de La Plata es
cic.versioninfo:eu-repo/semantics/submittedVersiones
dc.date.accessioned2016-09-06T16:10:17Z
dc.date.available2016-09-06T16:10:17Z
dc.identifier.urihttps://digital.cic.gba.gob.ar/handle/11746/4174
dc.titleDiscord and information deficit in the XX chainen
dc.typeArtículoes
dcterms.abstractWe examine the quantum correlations of spin pairs in the cyclic XX spin 1/2 chain in a trans- verse field, through the analysis of the quantum discord, the geometric discord and the information deficit. It is shown that while these quantities provide the same qualitative information, being non- zero for all temperatures and separations and exhibiting the same type of asymptotic behavior for large temperatures or separations, important differences arise in the minimizing local measurement that defines them. Whereas the quantum discord prefers a spin measurement perpendicular to the transverse field, the geometric discord and information deficit exhibit a perpendicular to parallel transition as the field increases, which subsists at all temperatures and for all separations. More- over, it is shown that such transition signals the change from a Bell state to an aligned separable state of the dominant eigenstate of the reduced density matrix of the pair. Full exact results for both the thermodynamic limit and the finite chain are provided, through the Jordan-Wigner fermionization.en
dcterms.creator.authorCiliberti, Leonardoes
dcterms.creator.authorCanosa, Normaes
dcterms.creator.authorRossignoli, Raúl Dantees
dcterms.extent23 p.es
dcterms.identifier.otherDOI: 10.1103/PhysRevA.88.012119es
dcterms.identifier.urlDocumento completoes
dcterms.isPartOf.issuevol. 88, nº 1es
dcterms.isPartOf.seriesPhysical Review Aes
dcterms.issued2013
dcterms.languageIngléses
dcterms.licenseAttribution 4.0 International (BY 4.0)es
dcterms.publisherAPS phisycses
dcterms.subjectquantum correlationsen
dcterms.subject.materiaCiencias Físicases
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