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Zbl 0984.82032
Metzler, Ralf; Klafter, Joseph
The random walk's guide to anomalous diffusion: A fractional dynamics approach. (English)
[J] Phys. Rep. 339, No.1, 1-77 (2000). ISSN 0370-1573

Summary: Fractional kinetic equations of the diffusion, diffusion-advection, and Fokker-Planck type are presented as a useful approach for the description of transport dynamics in complex systems which are governed by anomalous diffusion and non-exponential relaxation patterns. These fractional equations are derived asymptotically from basic random walk models, and from a generalised master equation. Several physical consequences are discussed which are relevant to dynamical processes in complex systems. Methods of solution are introduced and for some special cases exact solutions are calculated. This report demonstrates that fractional equations have become of age as a complementary tool in the description of anomalous transport processes.

MSC 2000:: *82C31 Stochastic methods in time-dependent statistical mechanics
82C70 Transport processes

Keywords: fractional kinetic equations; non-exponential relaxation patterns; Fokker-Planck type equations

Cited in: Zbl 1102.82032 Zbl 1125.82026

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