TRANSPORT GENERATED BY DICHOTOMOUS FLUCTUATIONS

Overdamped motion of Brownian particles in spatially periodic potentia ls and subjected to fluctuations modeled by asymmetric exponentially c orrelated two-state noise of zero mean value is considered. The probab ility current is presented in a closed form and analyzed in asymptotic regimes of very long and very short correlation times of the fluctuat ions. Explicit results are obtained for a piecewise linear potential. The role of correlations nod temporal asymmetry of fluctuations is elu cidated.