Ai Bao-quan, Liu Liang-gang
Institute for Condensed Matter Physics, School of Physics and Telecommunication Engineering, and Laboratory of Photonic Information Technology, South China Normal University, 510006 Guangzhou, People's Republic of China.
Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Oct;76(4 Pt 1):042103. doi: 10.1103/PhysRevE.76.042103. Epub 2007 Oct 25.
Based on recent work [L. Machura, M. Kostur, P. Talkner, J. Luczka, and P. Hanggi, Phys. Rev. Lett. 98, 040601 (2007)], we extend the study of inertial Brownian motors to the case of an asymmetric potential. It is found that some transport phenomena appear in the presence of an asymmetric potential. Within tailored parameter regimes, there exists two optimal values of the load at which the mean velocity takes its maximum, which means that a load can facilitate the transport in the two parameter regimes. In addition, the phenomenon of multiple current reversals can be observed when the load is increased.
基于最近的工作[L. 马胡拉、M. 科斯图尔、P. 塔尔克纳、J. 卢茨卡和P. 杭吉，《物理评论快报》98, 040601 (2007)]，我们将惯性布朗马达的研究扩展到非对称势的情况。发现在非对称势存在的情况下会出现一些输运现象。在特定的参数范围内，存在两个负载的最优值，此时平均速度达到最大值，这意味着在这两个参数范围内负载可以促进输运。此外，当负载增加时，可以观察到多次电流反转现象。
