Fractal structures of normal and anomalous diffusion in nonlinear nonhyperbolic dynamical systems

Details Fractal structures of normal and anomalous diffusion in nonlinear nonhyperbolic dynamical systems Fractal structures of normal and anomalous diffusion in nonlinear nonhyperbolic dynamical systems

2002-06-17

arxiv.org/abs/nlin/0206027v1

Phys.Rev.Lett. 89, 214102 (2002)

Nonlinear Sciences

Chaotic Dynamics

4 pages (revtex) with 4 figures (postscript)

Scientific paper

10.1103/PhysRevLett.89.214102

A paradigmatic nonhyperbolic dynamical system exhibiting deterministic diffusion is the smooth nonlinear climbing sine map. We find that this map generates fractal hierarchies of normal and anomalous diffusive regions as functions of the control parameter. The measure of these self-similar sets is positive, parameter-dependent, and in case of normal diffusion it shows a fractal diffusion coefficient. By using a Green-Kubo formula we link these fractal structures to the nonlinear microscopic dynamics in terms of fractal Takagi-like functions.

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