dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniversidade Estadual de Campinas (UNICAMP)
dc.contributorUniversity of Calgary
dc.contributorUniversidade Federal de São Carlos (UFSCar)
dc.contributorUniversidade Federal de Mato Grosso
dc.date.accessioned2014-05-27T11:28:40Z
dc.date.available2014-05-27T11:28:40Z
dc.date.created2014-05-27T11:28:40Z
dc.date.issued2013-03-13
dc.identifierPhysical Review A - Atomic, Molecular, and Optical Physics, v. 87, n. 3, 2013.
dc.identifier1050-2947
dc.identifier1094-1622
dc.identifierhttp://hdl.handle.net/11449/74826
dc.identifier10.1103/PhysRevA.87.032317
dc.identifierWOS:000316097000003
dc.identifier2-s2.0-84874966950
dc.identifier2-s2.0-84874966950.pdf
dc.identifier8884890472193474
dc.identifier0000-0003-3297-905X
dc.description.abstractUnlike correlation of classical systems, entanglement of quantum systems cannot be distributed at will: if one system A is maximally entangled with another system B, it cannot be entangled at all with a third system C. This concept, known as the monogamy of entanglement, is manifest when the entanglement of A with a pair BC can be divided as contributions of the entanglement between A and B and A and C, plus a term τABC involving genuine tripartite entanglement and so expected to be always positive. A very important measure in quantum information theory, the entanglement of formation (EOF), fails to satisfy this last requirement. Here we present the reasons for that and show a set of conditions that an arbitrary pure tripartite state must satisfy for the EOF to become a monogamous measure, i.e., for τABC≥0. The relation derived is connected to the discrepancy between quantum and classical correlations, τABC being negative whenever the quantum correlation prevails over the classical one. This result is employed to elucidate features of the distribution of entanglement during a dynamical evolution. It also helps to relate all monogamous instances of the EOF to the squashed sntanglement, an entanglement measure that is always monogamous. © 2013 American Physical Society.
dc.languageeng
dc.relationPhysical Review A: Atomic, Molecular, and Optical Physics
dc.relation1,288
dc.relation1,288
dc.rightsAcesso restrito
dc.sourceScopus
dc.subjectClassical correlation
dc.subjectClassical systems
dc.subjectDynamical evolution
dc.subjectEntanglement measure
dc.subjectQuantum correlations
dc.subjectQuantum information theory
dc.subjectQuantum system
dc.subjectTripartite entanglement
dc.subjectInformation theory
dc.subjectQuantum electronics
dc.subjectQuantum entanglement
dc.subjectQuantum optics
dc.titleWhy entanglement of formation is not generally monogamous
dc.typeArtículos de revistas


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