https://doi.org/10.1140/epjb/e2005-00309-x
Current reversal in a two-noise ratchet
1
School of Physics and Telecommunication
Engineering, South China Normal University, 510631, GuangZhou, China
2
Department of Physics, South China University of technology, 510641, GuangZhou, China
3
Department of Physics, ZhongShan University, 510275 GuangZhou, China
Corresponding author: a aibq@21cn.com
Received:
27
April
2005
Revised:
12
July
2005
Published online:
21
September
2005
Transport of a Brownian particle moving in a periodic potential is investigated in the presence of the two correlated noises. We present the analytical expression of the net current at quasi-steady state limit. The competitions among the asymmetric parameter of the potential, the noise correlation parameter and the temporal asymmetric parameter of driving force lead to the phenomena like current reversal. The competitions of different driving factors are necessary for current reversal.
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, 2005
