Phenomenon of Repeated Current Reversals in the Brownian Ratchet
YANG Ming1,3, CAO Li1,2,3, WU Da-Jin1,2,3, LI Xiang-Lian1
1Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
2CCAST (World Laboratory), PO Box 8730, Beijing 100080
3State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074
Phenomenon of Repeated Current Reversals in the Brownian Ratchet
YANG Ming1,3;CAO Li1,2,3;WU Da-Jin1,2,3;LI Xiang-Lian1
1Department of Physics, Huazhong University of Science and Technology, Wuhan 430074
2CCAST (World Laboratory), PO Box 8730, Beijing 100080
3State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074
Abstract： We study the probability current of the Brownian particles in a tilted periodic piecewise linear “saw-tooth” potential. It is found that the stationary probability current would take on a maximum value at a given additive noise if the intensity of the multiplicative noise is appropriate and at the same time both of the two noises are correlated; and the direction of the stationary probability current is reversed more than once upon some certain correlation intensities between both noises. It is proven that the occurrence of current reversal is only dependent on the relative intensity of the multiplicative and additive noises, but has nothing to do with the absolute intensities of the two noises.
(Theory of diffusion and ionic conduction in solids)
引用本文:
YANG Ming;CAO Li;;WU Da-Jin;;LI Xiang-Lian. Phenomenon of Repeated Current Reversals in the Brownian Ratchet
[J]. 中国物理快报, 2002, 19(12): 1759-1762.
YANG Ming, CAO Li, , WU Da-Jin, , LI Xiang-Lian. Phenomenon of Repeated Current Reversals in the Brownian Ratchet
. Chin. Phys. Lett., 2002, 19(12): 1759-1762.
2002, Vol. 19 
