Local available quantum correlations for Bell Diagonal states and Markovian decoherence

Hermann L Albrecht Q, Douglas F. Mundarain, Mario I. Caicedo S.

Abstract


Local available quantum correlations (LAQCs), as dened by Mundarain et al. [19], are analytically determined for Bell Diagonal states. Using the Kraus operators formalism [10], we analyze the dissipative dynamics of 2-qubit LAQCs under Markovian decoherence. This is done for Werner states under the depolarizing [20] and phase damping channels [21]. Since Werner states are among those that exhibit the so called entanglement sudden death [27], the results are compared with the ones obtained for Quantum Discord [22], as analyzed by Werlang et al. [24], as well as for entanglement, i.e. Concurrence[7]. The LAQCs quantier, as Quantum Discord does, only vanishes asymptotically.

Keywords


Quantum correlations; Bell Diagonal states; Werner states; Decoherence; Kraus operators

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DOI: https://doi.org/10.31349/RevMexFis.64.662

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Revista Mexicana de Física

ISSN: 0035-001X

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