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Disorder induced diffusive transport in ratchets
M N Popescu1, C M Arizmendi, A L Salas-Brito
1Department of Physics, Emory University, Atlanta, Georgia 30322, USA.
Physical Review Letters
|October 6, 2000
Abstract:
The effects of quenched disorder on the overdamped motion of a driven particle on a periodic, asymmetric potential are studied. While for the unperturbed potential the transport is due to a regular drift, the quenched disorder induces a significant additional chaotic "diffusive" motion. Possible applications to experiments in nanoscale surfaces and particle separation are discussed.