Figure 2.

(a) Dependence of the net rotation rate, ω, on the net bias, , for the most asymmetric sawtooth model depicted in Figure 1a, for two values of the effective barrier height, βε. (b) Dependence of the output power, P_W, on the thermodynamic efficiency, R, for βε = 1 and several values of the scaled driving force, β|Δμ|. (c) The maximum power efficiency as a function of driving force for the direct and inverse operation, when the roles of driving force and load are interchanged.