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Suppression and enhancement of diffusion in disordered dynamical systems

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Klages,  R.
Max Planck Institute for the Physics of Complex Systems, Max Planck Society;

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Klages, R. (2002). Suppression and enhancement of diffusion in disordered dynamical systems. Physical Review E, 65(5): 055203. Retrieved from http://ojps.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PLEEE8000065000005055203000001&idtype=cvips&gifs=yes.


Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-37A2-3
Abstract
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 complex scenario of multiple suppression and enhancement of normal diffusion, under variation of the perturbation strength. These results are explained by a theoretical approximation, 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.