Precise numerics versus theory for correlation ratchets.

Fluctuation-induced transport in a correlation ratchet driven by both additive Gaussian white and additive Ornstein-Uhlenbeck (colored) noise is studied numerically and interpreted against theoretical predictions. The current as well as the current-load curve exhibit a different behavior depending on the scaling of the colored noise strength. This archetypal correlation ratchet is capable of changing the direction of current (passing through zero at a particular value of noise color) if only the {ital shape} of the ratchet potential is chosen appropriately. {copyright} {ital 1996 The American Physical Society.}