Noise induced transport at zero temperature

Details Noise induced transport at zero temperature Noise induced transport at zero temperature

1997-11-06

arxiv.org/abs/cond-mat/9711055v1

Physics

Condensed Matter

Statistical Mechanics

LaTeX, 19 pages, 9 eps-figures included, accepted for publication in J. Phys. A

Scientific paper

10.1088/0305-4470/31/8/006

We consider a particle in the over-damped regime at zero temperature under the influence of a sawtooth potential and of a noisy force, which is correlated in time. A current occurs, even if the mean of the noisy force vanishes. We calculate the stationary probability distribution and the stationary current. We discuss, how these items depend on the characteristic parameters of the underlying stochastic process. A formal expansion of the current around the white-noise limit not always gives the correct asymptotic behaviour. We improve the expansion for some simple but representative cases.

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