Lyapunov Generation of Entanglement and the Correspondence Principle

Details Lyapunov Generation of Entanglement and the Correspondence Principle Lyapunov Generation of Entanglement and the Correspondence Principle

2005-10-20

arxiv.org/abs/quant-ph/0510157v1

Phys. Rev. Lett. 97, 194103 (2006).

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.97.194103

We show how a classically vanishing interaction generates entanglement between two initially nonentangled particles, without affecting their classical dynamics. For chaotic dynamics, the rate of entanglement is shown to saturate at the Lyapunov exponent of the classical dynamics as the interaction strength increases. In the saturation regime, the one-particle Wigner function follows classical dynamics better and better as one goes deeper and deeper in the semiclassical limit. This demonstrates that quantum-classical correspondence at the microscopic level requires neither high temperatures, nor coupling to a large number of external degrees of freedom.

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