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dc.title Quantum correlations and least disturbing local measurements en
dc.type Artículo es
dcterms.abstract We examine the evaluation of the minimum information loss due to an unread local measurement in mixed states of bipartite systems, for a general entropic form. Such quantity provides a measure of quantum correlations, reducing for pure states to the generalized entanglement entropy, while in the case of mixed states it vanishes just for classically correlated states with respect to the measured system, as the quantum discord. General stationary conditions are provided, together with their explicit form for general two-qubit states. Closed expressions for the minimum information loss as measured by quadratic and cubic entropies are also derived for general states of two-qubit systems. As application, we analyze the case of states with maximally mixed marginals, where a general evaluation is provided, as well as X states and the mixture of two aligned states. en
dcterms.extent 10 p. es
dcterms.issued 2011
dcterms.language Inglés es
dcterms.license Attribution 4.0 International (BY 4.0) es
dcterms.publisher APS phisycs es
dcterms.subject Quantum information en
cic.version info:eu-repo/semantics/publishedVersion es Rossignoli, Raúl Dante es Canosa, Norma es Ciliberti, Leonardo es
cic.lugarDesarrollo Universidad Nacional de La Plata es
dcterms.subject.materia Ciencias Físicas es
dcterms.identifier.url Documento completo es
dcterms.isPartOf.issue vol. 84, nº 5 es
dcterms.isPartOf.series Physical Review A es
cic.isPeerReviewed true es
cic.isFulltext true es


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