Propagation of nonclassical correlations across a quantum spin chain

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dc.contributor.authorCampbell, Steve
dc.contributor.authorApollaro, Tony J. G.
dc.contributor.authorDi Franco, Carlo
dc.contributor.authorBanchi, L.
dc.contributor.authorCuccoli, A.
dc.contributor.authorVaia, R.
dc.contributor.authorPlastina, F.
dc.contributor.authorPaternostro, Mauro
dc.contributor.funderBritish Council
dc.contributor.funderEngineering and Physical Sciences Research Council
dc.contributor.funderIrish Research Council for Science, Engineering and Technology
dc.contributor.funderMinistero dell’Istruzione, dell’Università e della Ricerca
dc.date.accessioned2017-08-22T10:30:38Z
dc.date.available2017-08-22T10:30:38Z
dc.date.issued2011
dc.description.abstractWe study the transport of quantum correlations across a chain of interacting spin-1/2 particles. As a quantitative figure of merit, we choose a symmetric version of quantum discord and compare it with the transported entanglement, addressing various operating regimes of the spin medium. Discord turns out to be better transported for a wide range of working points and initial conditions of the system. We relate this behavior to the efficiency of propagation of a single excitation across the spin chain. Moreover, we point out the role played by a magnetic field in the dynamics of discord in the effective channel embodied by the chain. Our analysis can be interestingly extended to transport processes in more complex networks and the study of nonclassical correlations under general quantum channels.en
dc.description.sponsorshipMinistero dell’Istruzione, dell’Università e della Ricerca (2008PARRTS003); Engineering and Physical Sciences Research Council (EP/G004579/1)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid52316
dc.identifier.citationCampbell, S., Apollaro, T. J. G., Di Franco, C., Banchi, L., Cuccoli, A., Vaia, R., Plastina, F. and Paternostro, M. (2011) 'Propagation of nonclassical correlations across a quantum spin chain', Physical Review A, 84(5), 052316 (8pp). doi: 10.1103/PhysRevA.84.052316en
dc.identifier.doi10.1103/PhysRevA.84.052316
dc.identifier.issn1050-2947
dc.identifier.issued5
dc.identifier.journaltitlePhysical Review Aen
dc.identifier.urihttps://hdl.handle.net/10468/4508
dc.identifier.volume84
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.84.052316
dc.rights© 2011, American Physical Societyen
dc.subjectEntanglementen
dc.subjectStateen
dc.titlePropagation of nonclassical correlations across a quantum spin chainen
dc.typeArticle (peer-reviewed)en
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