Stochastic pump of interacting particles
FOM Institute AMOLF - Science Park 104, 1098XG Amsterdam, The Netherlands, EU
2 Raman Research Institute - C V Raman Avenue, Sadashivanagar, Bangalore 560080, India
Accepted: 24 March 2011
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.
PACS: 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 05.60.-k – Transport processes
© EPLA, 2011