https://doi.org/10.1140/epjb/e2004-00089-9
Current reversals in an inhomogeneous system with asymmetric unbiased fluctuations
1
Department of Physics, ZhongShan University,
GuangZhou, P.R. China
2
Department of Physics, South China University of
technology, GuangZhou, P.R. China
3
Department of Physics, JiNan University, GuangZhou, P.R.
China
Corresponding author: a stdp05@zsu.edu.cn
Received:
9
September
2003
Revised:
11
October
2003
Published online:
9
April
2004
We present a study of the transport of a Brownian particle moving in a periodic symmetric potential in the presence of asymmetric unbiased fluctuations. The particle is considered to move in a medium with periodic space dependent friction. By tuning the parameters of the system, the direction of the current exhibits reversals, both as a function of temperature as well as the amplitude of rocking force. We found that the mutual interplay between the opposite driving factors is the necessary term for current reversals.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 02.50.Ey – Stochastic processes / 87.10.+e – General theory and mathematical aspects
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
