Mechanism of hypersensitive transport in tilted sharp ratchets

Romi Mankin¹, Astrid Haljas, Risto Tammelo

¹Department of Natural Sciences, Tallinn Pedagogical University, 25 Narva Road, 10120 Tallinn, Estonia.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|August 26, 2003

Abstract:

The noise-flatness-induced hypersensitive transport of overdamped Brownian particles in a tilted ratchet system driven by multiplicative nonequilibrium three-level Markovian noise and additive white noise is considered. At low temperatures, the enhancement of current is very sensitive to the applied small static tilting force. It is established that the enhancement of mobility depends nonmonotonically on the parameters (flatness, correlation time) of multiplicative noise. The optimal values of noise parameters maximizing the mobility are found.

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Abstract:

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