Ratchet transport of overdamped particles in superimposed driven lattices
Huang Shu-Na, Zhu Wei-Jing, Huang Xiao-Qun, Ai Bao-Quan †, Li Feng-Guo
       

(a) Contour plots of the average velocity V as a function of d and ϕ with white noise at D0 = 0.1 and ω = 1.0. (b) Contour plots of the average velocity V as a function of ω and ϕ with white noise at D0 = 0.1 and d = π.