title: Efficiency and current in a correlated ratchet.
abstract: 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.
authors.affiliation: Department of Physics, ZhongShan University, GuangZhou, China. aibq@21cn.com
authors.forename: Bao-Quan
authors.initials: BQ
authors.lastname: Ai
authors.forename: Guo-Tao
authors.initials: GT
authors.lastname: Liu
authors.forename: Hui-Zhang
authors.initials: HZ
authors.lastname: Xie
authors.forename: De-Hua
authors.initials: DH
authors.lastname: Wen
authors.forename: Xian-Ju
authors.initials: XJ
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Chen
authors.forename: Liang-Gang
authors.initials: LG
authors.lastname: Liu
mesh_terms: 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
chemical_list: D020409:Molecular Motor Proteins