When can the Fokker-Planck equation describe anomalous or chaotic transport?

D.F. Escande, F. Sattin

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34 Citations (Scopus)

Abstract

The Fokker-Planck equation, applied to transport processes in fusion plasmas, can model several anomalous features, including uphill transport, scaling of confinement time with system size, and convective propagation of externally induced perturbations. It can be justified for generic particle transport provided that there is enough randomness in the Hamiltonian describing the dynamics. Then, except for 1 degree of freedom, the two transport coefficients are largely independent. Depending on the statistics of interest, the same dynamical system may be found diffusive or dominated by its Lévy flights. © 2007 The American Physical Society.
Original languageEnglish
Article number185005
Pages (from-to)-
JournalPhysical Review Letters
Volume99
Issue number18
DOIs
Publication statusPublished - 2 Nov 2007
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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