Nondiffusive transport in plasma turbulence: a fractional diffusion approach.

  title={Nondiffusive transport in plasma turbulence: a fractional diffusion approach.},
  author={Diego del-Castillo-Negrete and Benjamin A. Carreras and Vickie E. Lynch},
  journal={Physical review letters},
  volume={94 6},
Numerical evidence of nondiffusive transport in three-dimensional, resistive pressure-gradient-driven plasma turbulence is presented. It is shown that the probability density function (pdf) of tracer particles' radial displacements is strongly non-Gaussian and exhibits algebraic decaying tails. To model these results we propose a macroscopic transport model for the pdf based on the use of fractional derivatives in space and time that incorporate in a unified way space-time nonlocality (non… CONTINUE READING

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