Nonstationary Transport of a Brownian Particle in a Model Ratchet Potential
No Thumbnail Available
Date
1999-06
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Addis Ababa University
Abstract
Considering a sawtooth-shaped symmetric periodic potential, we devise a model
ratchet potential by subdividing the potential balTier on one side along the
reaction path. For this new model of ratchet potential we examine the inter-well
escape rates of a Brownian particle using the known supersymmetric potential
approach. We show the existence of an optimal number of barrier subdivision at
\\'hich a unidirectional motion of the Brownian particle takes maximum speed of
nonstationary transport. We find that this speed is substantially larger than the
maximum speed that occurs for the classic ratchet potential. This may suggest the
best possible way of extracting useful work from random the1l11al background
Description
Keywords
Nonstationary Transport