Current reversals in a rocking ratchet: dynamical vs symmetry-breaking mechanisms

Details Current reversals in a rocking ratchet: dynamical vs symmetry-breaking mechanisms Current reversals in a rocking ratchet: dynamical vs symmetry-breaking mechanisms

2010-05-19

arxiv.org/abs/1005.3385v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

Directed transport in ratchets is determined by symmetry-breaking in a system out of equilibrium. A hallmark of rocking ratchets is current reversals: an increase in the rocking force changes the direction of the current. In this work for a bi-harmonically driven spatially symmetric rocking ratchet we show that a class of current reversal is precisely determined by symmetry-breaking, thus creating a link between dynamical and symmetry-breaking mechanisms.

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