title: Driving particle current through narrow channels using a classical pump.
abstract: We study a symmetric exclusion process in which the hopping rates at two chosen adjacent sites vary periodically in time and have a relative phase difference. This mimics a colloidal suspension subjected to external time-dependent modulation of the local chemical potential. The two special sites act as a classical pump by generating an oscillatory current with a nonzero dc value whose direction depends on the applied phase difference. We analyze various features in this model through simulations and obtain an expression for the dc current via a novel perturbative treatment.
authors.affiliation: Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, Israel.
authors.forename: Kavita
authors.initials: K
authors.lastname: Jain
authors.forename: Rahul
authors.initials: R
authors.lastname: Marathe
authors.forename: Abhishek
authors.initials: A
authors.lastname: Chaudhuri
authors.forename: Abhishek
authors.initials: A
authors.lastname: Dhar