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The Fokker-Planck Equation, applied to transport processes in fusion plasmas,can model several anomalous features, including uphill transport, scaling ofconfinement time with system size, and convective propagation of externallyinduced perturbations. It can be justified for generic particle transportprovided that there is enough randomness in the Hamiltonian describing thedynamics. Then, except for 1 degree-of-freedom, the two transport coefficientsare largely independent. Depending on the statistics of interest, the samedynamical system may be found diffusive or dominated by its L\'{e}vy flights.

When can Fokker-Planck Equation describe anomalous or chaotic transport?