Models of decoherence with negative dephasing rate

Details Models of decoherence with negative dephasing rate Models of decoherence with negative dephasing rate

2012-02-20

arxiv.org/abs/1202.4280v1

Physics

Quantum Physics

Scientific paper

We determine the total state dynamics of a dephasing open quantum system using the standard environment of harmonic oscillators. Of particular interest are random unitary approaches to the same reduced dynamics and system-environment correlations in the full model. Concentrating on a model with an at times negative dephasing rate, the issue of "non-Markovianity" will also be addressed with the emphasis on information obtained from the dynamics of the total state of system and environment: making use of criteria that allow us to distinguish between classically correlated and entangled total states, we employ a simple measure for the correlations emerging from the increase of the two local entropies, and relate it the nature of the correlations.

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