Selection of Squeezed States via Decoherence

Details Selection of Squeezed States via Decoherence Selection of Squeezed States via Decoherence

2002-05-20

arxiv.org/abs/quant-ph/0205127v1

Europhys. Lett. 47 (3), pp. 279-284 (1999)

Physics

Quantum Physics

Latex, 7 pages

Scientific paper

10.1209/epl/i1999-00386-y

In the framework of Lindblad theory for open quantum systems, we calculate the entropy of a damped quantum harmonic oscillator which is initially in a quasi-free state. The maximally predictable states are identified as those states producing the minimum entropy increase after a long enough time. In general, the states with a squeezing parameter depending on the environment's diffusion coefficients and friction constant are singled out, but if the friction constant is much smaller than the oscillator's frequency, coherent states (or thermalized coherent states) are obtained as the preferred classical states.

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