Brownian Motion Model of Quantization Ambiguity and Universality in Chaotic Systems

Nonlinear Sciences – Chaotic Dynamics

Scientific paper

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13 pages, 6 figures, submitted to Phys Rev E

Scientific paper

10.1103/PhysRevE.72.036214

We examine spectral equilibration of quantum chaotic spectra to universal statistics, in the context of the Brownian motion model. Two competing time scales, proportional and inversely proportional to the classical relaxation time, jointly govern the equilibration process. Multiplicity of quantum systems having the same semiclassical limit is not sufficient to obtain equilibration of any spectral modes in two-dimensional systems, while in three-dimensional systems equilibration for some spectral modes is possible if the classical relaxation rate is slow. Connections are made with upper bounds on semiclassical accuracy and with fidelity decay in the presence of a weak perturbation.

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