Nonclassical correlation in a multipartite quantum system: two measures and evaluation

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dc.creatorSaiToh, Akira
dc.creatorRahimi, Robabeh
dc.creatorNakahara, Mikio
dc.date2007-03-15
dc.date2008-04-21
dc.date.accessioned2026-07-07T09:36:28Z
dc.date.available2026-07-07T09:36:28Z
dc.descriptionThere is a commonly recognized paradigm in which a multipartite quantum system described by a density matrix having no product eigenbasis is considered to possess nonclassical correlation. Supporting this paradigm, we define two entropic measures of nonclassical correlation of a multipartite quantum system. One is defined as the minimum uncertainty about a joint system after we collect outcomes of particular local measurements. The other is defined by taking the maximum over all local systems about the minimum distance between a genuine set and a mimic set of eigenvalues of a reduced density matrix of a local system. The latter measure is based on an artificial game to create mimic eigenvalues of a reduced density matrix of a local system from eigenvalues of a density matrix of a global system. Numerical computation of these measures for several examples is performed.
dc.descriptionv1: 10 pages, 8 figures, IOPART, v2: introduction modified, figure 7 replaced, v3: 10 pages, 10 figures, RevTeX4, major revision with an additional measure introduced, title changed (previous title: Non-classical correlation in a multi-partite quantum system reconsidered), to appear in Phys. Rev. A
dc.identifierhttps://arxiv.org/abs/quant-ph/0703133
dc.identifierhttp://arxiv.org/abs/quant-ph/0703133
dc.identifierPhys. Rev. A 77, 052101 (2008)
dc.identifierdoi:10.1103/PhysRevA.77.052101
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/160133
dc.subjectQuantum Physics
dc.titleNonclassical correlation in a multipartite quantum system: two measures and evaluation
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