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Maximally entangled mixed states and conditional entropies

AuthorsBatle, Josep; Casas, Montserrat ; Plastino, Ángel R.; Plastino, A.
KeywordsQuantum entanglement
Quantum gates
[PACS] Information theory and communication theory
Issue Date14-Feb-2005
PublisherAmerican Physical Society
CitationPhysical Review A 71, 024301 (2005)
AbstractThe maximally entangled mixed states of Munro et al. [Phys. Rev. A 64, 030302 (2001)] are shown to exhibit interesting features vis á vis conditional entropic measures. The same happens with the Ishizaka and Hiroshima states [Phys. Rev. A 62, 022310 (2000)], whose entanglement degree cannot be increased by acting on them with logic gates. Special types of entangled states that do not violate classical entropic inequalities are seen to exist in the space of two qubits. Special meaning can be assigned to the Munro et al. special participation ratio of 1.8.
Description4 pages, 2 figures.-- PACS nrs.: 03.67.Mn, 89.70.+c.-- ArXiv pre-print available at: http://arxiv.org/abs/quant-ph/0603056
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevA.71.024301
Appears in Collections:(IFISC) Artículos
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