Non-transverse factorizing fields and entanglement in finite spin systems

cic.isFulltexttruees
cic.isPeerReviewedtruees
cic.lugarDesarrolloUniversidad Nacional de La Plataes
cic.versioninfo:eu-repo/semantics/acceptedVersiones
dc.date.accessioned2019-05-16T14:00:33Z
dc.date.available2019-05-16T14:00:33Z
dc.identifier.urihttps://digital.cic.gba.gob.ar/handle/11746/9980
dc.titleNon-transverse factorizing fields and entanglement in finite spin systemsen
dc.typeArtículoes
dcterms.abstractWe determine the conditions for the existence of non-transverse factorizing magnetic fields in general spin arrays with anisotropic XY Z couplings of arbitrary range. It is first shown that a uniform maximally aligned completely separable eigenstate can exist just for fields hs parallel to a principal plane and forming four straight lines in field space, with the alignment direction different from that of hs and determined by the anisotropy. Such state always becomes a non-degenerate ground state (GS) for sufficiently strong (yet finite) fields along these lines, in both ferromagnetic (FM) and antiferromagnetic (AFM) type systems. In AFM chains, this field coexists with the nontransverse factorizing field h′ s associated with a degenerate N´eel-type separable GS, which is shown to arise at a level crossing in a finite chain. It is also demonstrated for arbitrary spin that pairwise entanglement reaches full range in the vicinity of both hs and h′ s, vanishing at hs but approaching small yet finite side-limits at h′ s, which are analytically determined. The behavior of the block entropy and entanglement spectrum in their vicinity is also analyzed.en
dcterms.creator.authorCerezo, M.es
dcterms.creator.authorRossignoli, Raúl Dantees
dcterms.creator.authorCanosa, Norma Beatrizes
dcterms.extent10 p.es
dcterms.identifier.otherdoi:10.1103/PhysRevB.92.224422es
dcterms.identifier.urlRecurso onlinees
dcterms.isPartOf.issuevol. 92, no. 22es
dcterms.isPartOf.seriesPhysical Review Bes
dcterms.issued2015-12-16
dcterms.languageIngléses
dcterms.licenseAttribution-NonCommercial-ShareAlike 4.0 International (BY-NC-SA 4.0)es
dcterms.subjectquantum spin systemsen
dcterms.subjectentanglementen
dcterms.subjectfactorizationen
dcterms.subject.materiaCiencias Físicases
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