Facilitated movement of inertial Brownian motors driven by a load under an asymmetric potential.
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.
Ai
Bao-quan
BQ
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. aibq@hotmail.com
Liu
Liang-gang
LG