Suppression and Enhancement of Diffusion in Disordered Dynamical Systems

Details Suppression and Enhancement of Diffusion in Disordered Dynamical Systems Suppression and Enhancement of Diffusion in Disordered Dynamical Systems

2001-08-16

arxiv.org/abs/nlin/0108031v1

Phys.Rev.E 65, 055203(R) (2002)

Nonlinear Sciences

Chaotic Dynamics

4 pages (revtex) with 3 figures (postscript)

Scientific paper

10.1103/PhysRevE.65.055203

The impact of quenched disorder on deterministic diffusion in chaotic dynamical systems is studied. As a simple example, we consider piecewise linear maps on the line. In computer simulations we find a complicated scenario of multiple suppression and enhancement of normal diffusion under variation of the perturbation strength. These results are explained by a theoretical argument showing that the oscillations emerge as a direct consequence of the unperturbed diffusion coefficient, which is known to be a fractal function of a control parameter.

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