Fractional Kramers Equation

Details Fractional Kramers Equation Fractional Kramers Equation

2000-02-01

arxiv.org/abs/cond-mat/0002020v1

Physics

Condensed Matter

Statistical Mechanics

To appear in J. Phys. Chem. B. as part of the special issue ``Harvey Scher Festschrift''

Scientific paper

We introduce a fractional Kramers equation for a particle interacting with a thermal heat bath and external non-linear force field. For the force free case the velocity damping follows the Mittag-Leffler relaxation and the diffusion is enhanced. The equation obeys the generalized Einstein relation, and its stationary solution is the Boltzmann distribution. Our results are compared to previous results on enhanced L\'evy type of diffusion derived from stochastic collision models.

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