Energetics of rocked inhomogeneous ratchets

Details Energetics of rocked inhomogeneous ratchets Energetics of rocked inhomogeneous ratchets

2001-06-29

arxiv.org/abs/cond-mat/0106631v2

Phys. Rev. E 65, 037105 (2002)

Physics

Condensed Matter

Statistical Mechanics

5 figures

Scientific paper

10.1103/PhysRevE.65.037105

We study the efficiency of frictional thermal ratchets driven by finite frequency driving force and in contact with a heat bath. The efficiency exhibits varied behavior with driving frequency. Both nonmonotonic and monotonic behavior have been observed. In particular the magnitude of efficiency in finite frequency regime may be more than the efficiency in the adiabatic regime. This is our central result for rocked ratchets. We also show that for the simple potential we have chosen, the presence of only spatial asymmetry (homogeneous system) or only frictional ratchet (symmetric potential profile), the adiabatic efficiency is always more than in the nonadiabatic case.

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