【摘 要】
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Transport ofa Brownian particle moving in a symmetric potential is investigated in the presence of an asymmetricunbiased exteal force. The viscous medium is alt
【机 构】
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School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510631
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Transport ofa Brownian particle moving in a symmetric potential is investigated in the presence of an asymmetricunbiased exteal force. The viscous medium is alteately in contact with the two heat reservoirs. We presentthe analytical expression of the net current at the quasi-steady state limit. It is found that the competition of thetemporal asymmetric parameter of the driving force with the temperature difference leads to current reversals.The competition between the two opposite driving factors is a necessary but not a sufficient condition for currentreversals.
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