Entanglement in the classical limit: quantum correlations from classical probabilities

Details Entanglement in the classical limit: quantum correlations from classical probabilities Entanglement in the classical limit: quantum correlations from classical probabilities

2011-01-31

arxiv.org/abs/1101.5937v1

Phys. Rev. A 84, 022111 (2011)

Physics

Quantum Physics

10 pages 3 figures

Scientific paper

We investigate entanglement for a composite closed system endowed with a scaling property allowing to keep the dynamics invariant while the effective Planck constant hbar_eff of the system is varied. Entanglement increases as hbar_eff goes to 0. Moreover for sufficiently low hbar_eff the evolution of the quantum correlations, encapsulated for example in the quantum discord, can be obtained from the mutual information of the corresponding \emph{classical} system. We show this behavior is due to the local suppression of path interferences in the interaction that generates the entanglement. This behavior should be generic for quantum systems in the classical limit.

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