Noise-assisted classical adiabatic pumping in a symmetric periodic potential

O. Usmani, E. Lutz, M. Buttiker

Published 2002-04-15Version 2

We consider a classical overdamped Brownian particle moving in a symmetric periodic potential. We show that a net particle flow can be produced by adiabatically changing two external periodic potentials with a spatial and a temporal phase difference. The classical pumped current is found to be independent of the friction and to vanish both in the limit of low and high temperature. Below a critical temperature, adiabatic pumping appears to be more efficient than transport due to a constant external force.