Current reversal in a flashing correlation ratchet

A flashing correlation ratchet model is proposed, in which the transport of Brownian particles driven by additive colored noise of Ornstein-Uhlenbeck type in a flashing ratchet is studied by Monte Carlo simulation. The statio nary current vs the noise strength and the correlation time is obtained and analyzed. For a fixed rate of potential flashing, the novel phenomena of c urrent reversal and reentry occur. The conditions for the occurrence of the se phenomena are found. The influence of the flipping rate is also discusse d. This finding might be relevant to the fact that the protein motors with similar structure can move in opposite directions on the same kind of micro tubule.