Experimental investigation of the non-Markovian dynamics of classical and quantum correlations

Details Experimental investigation of the non-Markovian dynamics of classical and quantum correlations Experimental investigation of the non-Markovian dynamics of classical and quantum correlations

2010-05-25

arxiv.org/abs/1005.4510v2

Phys. Rev. A 82, 042328 (2010)

Physics

Quantum Physics

extended revision, accepted for publication in Physical Review A

Scientific paper

We experimentally investigate the dynamics of classical and quantum correlations of a Bell diagonal state in a non-Markovian dephasing environment. The sudden transition from classical to quantum decoherence regime is observed during the dynamics of such kind of Bell diagonal state. Due to the refocusing effect of the overall relative phase, the quantum correlation revives from near zero and then decays again in the subsequent evolution. However, the non-Markovian effect is too weak to revive the classical correlation, which remains constant in the same evolution range. With the implementation of an optical $\sigma_{x}$ operation, the sudden transition from quantum to classical revival regime is obtained and correlation echoes are formed. Our method can be used to control the revival time of correlations, which would be important in quantum memory.

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