Efficiency and current in a correlated ratchet.
We present a detailed study of the transport and the efficiency of a ratchet system in a periodic potential in the presence of correlated noises. The current and the efficiency of the system are investigated. It is found that, when the potential is spatially symmetric, the correlation between the two noises can induce a net transport. The efficiency shows many interesting features as a function of the applied force, the noise intensity, the external load, etc. The efficiency can be maximized as a function of noise intensity (or temperature), which shows that the thermal fluctuation can facilitate the efficiency of energy transformation.
Ai
Bao-Quan
BQ
Department of Physics, ZhongShan University, GuangZhou, China. aibq@21cn.com
Liu
Guo-Tao
GT
Xie
Hui-Zhang
HZ
Wen
De-Hua
DH
Wang
Xian-Ju
XJ
Chen
Wei
W
Liu
Liang-Gang
LG
D003198:Computer Simulation; D004735:Energy Transfer / Q000502:physiology*; D008954:Models, Biological; D008956:Models, Chemical; D015233:Models, Statistical; D020409:Molecular Motor Proteins / Q000737:chemistry* / Q000502:physiology*; D009068:Movement / Q000502:physiology*; D017711:Nonlinear Dynamics; D013223:Statistics as Topic; D013269:Stochastic Processes
D020409:Molecular Motor Proteins