Diffusion accompanying noise induced transport in frictional ratchets

Details Diffusion accompanying noise induced transport in frictional ratchets Diffusion accompanying noise induced transport in frictional ratchets

2004-09-11

arxiv.org/abs/cond-mat/0409287v1

Physics

Condensed Matter

Statistical Mechanics

6 pages, 6 figures

Scientific paper

We study the noise induced transport of an overdamped Brownian particle in frictional ratchet systems in the presence of external Gaussian white noise fluctuations. The analytical expressions for current and diffusion coefficient are derived and the reliability or coherence of transport are discussed by means of their ratio. We show that frictional ratchets exhibit larger coherence as compared to the flashing and rocking ratchets.

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