Quantum coherence, evolution of the Wigner function, and transition from quantum to classical dynamics for a chaotic system.
The paper deals with dynamics of a quantum chaotic system under influence of an environment. The effect of an environment is known to destroy the quantum coherence and can convert the quantum dynamics of a system to classical. We use a semiclassical technique for studying the process of decoherence. The condition for transition from quantum to classical dynamics is obtained in general form and checked numerically for a particular chaotic system, known as quantum the standard map on a torus. The relevance of the obtained results to the problem of correspondence between quantum and classical mechanics is briefly discussed. (c) 1996 American Institute of Physics.
Kolovsky
Andrey R.
AR
L. V. Kirensky Institute of Physics, 660036 Krasnoyarsk, Russia.