Sudden transition between classical and quantum decoherence

Details Sudden transition between classical and quantum decoherence Sudden transition between classical and quantum decoherence

2010-01-29

arxiv.org/abs/1001.5441v3

Phys. Rev. Lett. 104, 200401 (2010)

Physics

Quantum Physics

version accepted for publication by Physical Review Letters

Scientific paper

We study the dynamics of quantum and classical correlations in the presence of nondissipative decoherence. We discover a class of initial states for which the quantum correlations, quantified by the quantum discord, are not destroyed by decoherence for times t < \bar{t}. In this initial time interval classical correlations decay. For t > \bar{t}, on the other hand, classical correlations do not change in time and only quantum correlations are lost due to the interaction with the environment. Therefore, at the transition time \bar{t} the open system dynamics exhibits a sudden transition from classical to quantum decoherence regime.

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