Dispersionless transport in a washboard potential

Details Dispersionless transport in a washboard potential Dispersionless transport in a washboard potential

2006-12-01

arxiv.org/abs/cond-mat/0612047v1

Physics

Condensed Matter

Statistical Mechanics

To appear in Phys. Rev. Letters

Scientific paper

We study and characterize a new dynamical regime of underdamped particles in a tilted washboard potential. We find that for small friction in a finite range of forces the particles move essentially nondispersively, that is, coherently, over long intervals of time. The associated distribution of the particle positions moves at an essentially constant velocity and is far from Gaussian-like. This new regime is complementary to, and entirely different from, well-known nonlinear response and large dispersion regimes observed for other values of the external force.

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