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Effects of Asymmetry of Potential on Stochastic Stokes’ Drift |
| LI Yu-Xiao1,2;CAO Tian-Guang1;WU Xi-Zhen1;ZHUO Yi-Zhong1,3 |
| 1China Institute of Atomic Energy, P.O. Box 275(18), Beijing 102413
2Department of Physics, Zhengzhou University, Zhengzhou 450052
3Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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LI Yu-Xiao, CAO Tian-Guang, WU Xi-Zhen et al 2001 Chin. Phys. Lett. 18 488-490 |
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Abstract The directed motion of Brownian particles is generated by a travelling asymmetric potential. The asymptotic behaviour of probability density of the particles at long time is a solitary wave. The Brownian particles can do work against an external opposing force with high efficiency. The analytical expressions of the solitary wave and the efficiency of the Brownian particles are obtained. The average velocity and the efficiency of the particles depends strongly on the travelling speed and the asymmetry of the potential.
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| Keywords:
05.40.-a
05.60.-k
02.50.-r
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Published: 01 April 2001
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| PACS: |
05.40.-a
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(Fluctuation phenomena, random processes, noise, and Brownian motion)
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05.60.-k
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(Transport processes)
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02.50.-r
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(Probability theory, stochastic processes, and statistics)
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