Deterministic transport in ratchets

We present the deterministic transport properties of driven overdamped part icles in a simple piecewise-linear ratchet potential. We consider the effec ts on the stationary current due to local spatial asymmetry, time asymmetry in the driving force, and we include the possibility of a global spatial a symmetry. We present an extremely simple scheme for evaluating the current that is established on the ratchet within an "adiabatic" approximation, and compare the results with exact numerical integration of the process. [S106 3-651X(99)01305-7].