Classical Diffusion and Quantum Level Velocities: Systematic Deviations from Random Matrix Theory

Details Classical Diffusion and Quantum Level Velocities: Systematic Deviations from Random Matrix Theory Classical Diffusion and Quantum Level Velocities: Systematic Deviations from Random Matrix Theory

1999-06-03

arxiv.org/abs/chao-dyn/9906009v1

Nonlinear Sciences

Chaotic Dynamics

20 pages, 4 PostScript figures files. Submitted to PRE

Scientific paper

10.1103/PhysRevE.60.3992

We study the response of the quasi-energy levels in the context of quantized chaotic systems through the level velocity variance and relate them to classical diffusion coefficients using detailed semiclassical analysis. The systematic deviations from random matrix theory, assuming independence of eigenvectors from eigenvalues, is shown to be connected to classical higher order time correlations of the chaotic system. We study the standard map as a specific example, and thus the well known oscillatory behavior of the diffusion coefficient with respect to the parameter is reflected exactly in the oscillations of the variance of the level velocities. We study the case of mixed phase-space dynamics as well and note a transition in the scaling properties of the variance that occurs along with the classical transition to chaos.

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