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Revista mexicana de física

versão impressa ISSN 0035-001X

Resumo

ALBRECHT Q., H.L.; MUNDARAIN, D.F.  e  CAICEDO S., M.I.. Local available quantum correlations for Bell diagonal states and Markovian decoherence. Rev. mex. fis. [online]. 2018, vol.64, n.6, pp.662-670.  Epub 05-Nov-2019. ISSN 0035-001X.  http://dx.doi.org/10.31349/revmexfis.64.662.

Local available quantum correlations (LAQCs), as defined by Mundarain et al., are analytically determined for Bell Diagonal states. Using the Kraus operators formalism, we analyze the dissipative dynamics of 2-qubit LAQCs under Markovian decoherence. This is done for Werner states under the depolarizing and phase damping channels. Since Werner states are among those that exhibit the so called entanglement sudden death, the results are compared with the ones obtained for Quantum Discord, as analyzed by Werlang et al., as well as for entanglement, i.e. Concurrence. The LAQCs quantifier only vanishes asymptotically, as was shown to be the case for Quantum Discord, in spite of being lower.

Palavras-chave : Quantum correlations; quantum discord; entanglement; Bell diagonal states; Werner states; decoherence; Kraus operators; 03.65.Ud; 03.65.Yz; 03.67.Mn.

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