Dissipative Chaotic Quantum Maps: Expectation Values, Correlation Functions and the Invariant State

Details Dissipative Chaotic Quantum Maps: Expectation Values, Correlation Functions and the Invariant State Dissipative Chaotic Quantum Maps: Expectation Values, Correlation Functions and the Invariant State

1999-10-07

arxiv.org/abs/chao-dyn/9910009v2

Nonlinear Sciences

Chaotic Dynamics

14 revtex pages including 4 ps figures

Scientific paper

10.1007/s100530070099

I investigate the propagator of the Wigner function for a dissipative chaotic quantum map. I show that a small amount of dissipation reduces the propagator of sufficiently smooth Wigner functions to its classical counterpart, the Frobenius-Perron operator, if $\hbar\to 0$. Several consequences arise: The Wigner transform of the invariant density matrix is a smeared out version of the classical strange attractor; time dependent expectation values and correlation functions of observables can be evaluated via hybrid quantum-classical formulae in which the quantum character enters only via the initial Wigner function. If a classical phase-space distribution is chosen for the latter or if the map is iterated sufficiently many times the formulae become entirely classical, and powerful classical trace formulae apply.

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