A1 Refereed original research article in a scientific journal
Constant quantum correlations in Markovian and non-Markovian environments
Authors: Mazzola L, Piilo J, Maniscalco S
Publisher: SOC MEXICANA FISICA
Publication year: 2011
Journal: Revista Mexicana de Fisica
Journal name in source: REVISTA MEXICANA DE FISICA
Journal acronym: REV MEX FIS
Number in series: 3
Volume: 57
Issue: 3
First page : 85
Last page: 90
Number of pages: 6
ISSN: 0035-001X
Abstract
We investigate the dynamics of quantum correlation of two qubits under local dephasing channels. We demonstrate the constancy of quantum correlation for long interval of times despite the detrimental effects of the environments. The natural protection of quantum correlation is accompanied by losses of classical correlation. At a sharp time, quantum and classical correlations exchange their roles: quantum correlation starts to decay while classical correlations become constant. We have called this phenomenon "sudden transition between classical and quantum decoherence" [Physical Review Letters 104, 200401 (2010)]. Such a dynamical feature is not the result of the Markovian approximation, but it appears in a much richer way also in the non-Markovian scenario.
We investigate the dynamics of quantum correlation of two qubits under local dephasing channels. We demonstrate the constancy of quantum correlation for long interval of times despite the detrimental effects of the environments. The natural protection of quantum correlation is accompanied by losses of classical correlation. At a sharp time, quantum and classical correlations exchange their roles: quantum correlation starts to decay while classical correlations become constant. We have called this phenomenon "sudden transition between classical and quantum decoherence" [Physical Review Letters 104, 200401 (2010)]. Such a dynamical feature is not the result of the Markovian approximation, but it appears in a much richer way also in the non-Markovian scenario.
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