D Cubero, J Casado-Pascual, A Alvarez, M Morillo and P Hänggi (pdf copy 230 Kb)
We investigate a dissipative, deterministic ratchet model in the over-damped regime driven by a rectangular force. Extensive numerical calculations are presented in a diagram depicting the drift velocity as a function of a wide range of the driving parameter values.We also present some theoretical considerations which explain some features of the mentioned diagram. In particular, we proof the existence of regions in the driving parameter space with bounded particle motion possessing zero current. Moreover, we present an explicit analytical expression for the drift velocity in the adiabatic limit.
Acta Physica Polonica B 37(5):1467–1477, May 2006.