Quantum coherence and uncertainty in the anisotropic XY chain

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dc.contributor.authorKarpat, G. [UNESP]
dc.contributor.authorÇakmak, B.
dc.contributor.authorFanchini, F. F. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionFaculty of Engineering and Natural Sciences, Sabanci University
dc.date.accessioned2018-12-11T16:37:51Z
dc.date.available2018-12-11T16:37:51Z
dc.date.issued2014-09-30
dc.description.abstractWe explore the local quantum coherence and the local quantum uncertainty, based on Wigner-Yanase skew information, in the ground state of the anisotropic spin-1/2 XY chain in a transverse magnetic field. We show that the skew information, as a figure of merit, supplies the necessary information to reveal the occurrence of the second-order phase transition and the completely factorized ground state in the XY model. Additionally, in the same context, we also discuss the usefulness of a simple experimentally friendly lower bound of local quantum coherence. Furthermore, we demonstrate how the connection between the appearance of nonanalyticities in the local quantum uncertainty of the ground state and the quantum phase transitions does not hold in general, by providing explicit examples of the situation. Lastly, we discuss the ability of the local quantum coherence to accurately estimate the critical point of the phase transition, and we investigate the robustness of the factorization phenomenon at low temperatures.en
dc.description.affiliationFaculdade de Ciências, UNESP-Universidade Estadual Paulista
dc.description.affiliationFaculty of Engineering and Natural Sciences, Sabanci University
dc.description.affiliationUnespFaculdade de Ciências, UNESP-Universidade Estadual Paulista
dc.identifierhttp://dx.doi.org/10.1103/PhysRevB.90.104431
dc.identifier.citationPhysical Review B - Condensed Matter and Materials Physics, v. 90, n. 10, 2014.
dc.identifier.doi10.1103/PhysRevB.90.104431
dc.identifier.file2-s2.0-84907452251.pdf
dc.identifier.issn1550-235X
dc.identifier.issn1098-0121
dc.identifier.lattes8884890472193474
dc.identifier.orcid0000-0003-3297-905X
dc.identifier.scopus2-s2.0-84907452251
dc.identifier.urihttp://hdl.handle.net/11449/167667
dc.language.isoeng
dc.relation.ispartofPhysical Review B - Condensed Matter and Materials Physics
dc.relation.ispartofsjr1,604
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.titleQuantum coherence and uncertainty in the anisotropic XY chainen
dc.typeArtigo
unesp.author.lattes8884890472193474[3]
unesp.author.orcid0000-0003-3297-905X[3]

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