Abstract Using the Langevin Monte Carlo method, the influence of friction on the directed motion of a Brownian particle driven by an external noise source is investigated. The results show that the existence and change of the environment friction influence the establishment and development of the steady motion of a Brownian particle derived by non-equilibrium fluctuation. The most probable correlation time, which corresponds to the maximum current, is inversely proportional to the friction coefficient. The abnormal transition of the current with different friction appears because of the coupling between the effective ratchet potential and coloured noise intensity.
Received: 03 January 2001
Revised: 05 March 2002
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No 10075007), by the Natural Science Foundation of Hebei Province, China (Grant No 102001) and by the Doctoral Fund of Hebei Province, China (Grant Nos B2001128 and 0054701D).
Cite this article:
Zhan Yong (展永), Zhao Tong-Jun (赵同军), Yu Hui (于慧), Song Yan-Li (宋艳丽) Transport properties under the influence of finite friction 2002 Chinese Physics 11 624
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