Vortex ratchet

Details Vortex ratchet Vortex ratchet

2002-11-04

arxiv.org/abs/cond-mat/0211067v1

Physics

Condensed Matter

Soft Condensed Matter

Contribution to the Proceedings to the meeting `Stochastic Systems: From Randomness to Complexity'. (Erice, Italy, July 2002)

Scientific paper

10.1016/S0378-4371(03)00183-3

We present a new class of thermal ratchets operating under the action of a symmetry breaking non-Hermitian perturbation which rectifies thermal fluctuations, and driven by a unbiased periodic force. The peculiar non-Hermitian dynamics which follows causes energy transduction from the force to the system in such a way that an average `uphill' particle current is induced. We discuss physical realizations in assemblies of orientable particles, in itinerant oscillator models, and in problems of diffusion in disordered media.

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