Stochastic pump of interacting particles

Details Stochastic pump of interacting particles Stochastic pump of interacting particles

2010-12-28

arxiv.org/abs/1012.5760v1

EPL, 94 (2011) 30006

Physics

Condensed Matter

Statistical Mechanics

4 pages, 2 figures

Scientific paper

10.1209/0295-5075/94/30006

We consider the overdamped motion of Brownian particles, interacting via particle exclusion, in an external potential that varies with time and space. We show that periodic potentials that maintain specific position-dependent phase relations generate time-averaged directed current of particles. We obtain analytic results for a lattice version of the model using a recently developed perturbative approach. Many interesting features like particle-hole symmetry, current reversal with changing density, and system-size dependence of current are obtained. We propose possible experiments to test our predictions.

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