Current Inversion in a Temperature Ratchet with Asymmetric Unbiased External Forces
AI Bao-Quan1, XIE Hui-Zhang2, LIU Liang-Gang3
1School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510631
2Department of Physics, South China University of Technology, Guangzhou 510641
3Department of Physics, Zhongshan University, Guangzhou 510275
Current Inversion in a Temperature Ratchet with Asymmetric Unbiased External Forces
AI Bao-Quan1;XIE Hui-Zhang2;LIU Liang-Gang3
1School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510631
2Department of Physics, South China University of Technology, Guangzhou 510641
3Department of Physics, Zhongshan University, Guangzhou 510275
Abstract： Transport of a Brownian particle moving in a symmetric potential is investigated in the presence of an asymmetric unbiased external force. The viscous medium is alternately in contact with the two heat reservoirs. We present the analytical expression of the net current at the quasi-steady state limit. It is found that the competition of the temporal 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 current reversals.
AI Bao-Quan;XIE Hui-Zhang;LIU Liang-Gang. Current Inversion in a Temperature Ratchet with Asymmetric Unbiased External Forces[J]. 中国物理快报, 2005, 22(11): 2772-2775.
AI Bao-Quan, XIE Hui-Zhang, LIU Liang-Gang. Current Inversion in a Temperature Ratchet with Asymmetric Unbiased External Forces. Chin. Phys. Lett., 2005, 22(11): 2772-2775.
2005, Vol. 22 
