Paradoxical non-linear response of a Brownian particle

Details Paradoxical non-linear response of a Brownian particle Paradoxical non-linear response of a Brownian particle

2004-06-07

arxiv.org/abs/cond-mat/0406155v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevE.70.035106

We consider a Brownian particle in a ``meandering'' periodic potential when the ambient temperature is a periodically or stochastically varying function of time. Though far from equilibrium, the linear response of the particle to an external static force is exactly the same as in the equilibrium case, i.e. for constant temperature. Even more surprising is the non-linear response: the particle slows down and then even starts to move in the direction opposite to the applied force.

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