Current Reversal Due to Coupling Between Asymmetrical Driving Force and Ratchet Potential
Current Reversal Due to Coupling Between Asymmetrical Driving Force and Ratchet Potential
摘要
Transport of a Brownian particle moving in a periodic potential is investigated in the presence of an asymmetric unbiased external force. The asymmetry of the external force and the asymmetry of the potentlal are the two ways of inducing a net current. It is found that the competition of the spatial asymmetry of potential with the temporal asymmetry of the external force leads to the phenomena like current reversal The competition between the two opposite driving factors is a necessary but not a sufficient condition for current reversals.
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