Fractional Kramers Equation
Statistical Mechanics
2007-05-23 v1
Abstract
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.
Cite
@article{arxiv.cond-mat/0002020,
title = {Fractional Kramers Equation},
author = {E. Barkai and R. Silbey},
journal= {arXiv preprint arXiv:cond-mat/0002020},
year = {2007}
}
Comments
To appear in J. Phys. Chem. B. as part of the special issue ``Harvey Scher Festschrift''