Nonequilibrium stationary states with ratchet effect

Details Nonequilibrium stationary states with ratchet effect Nonequilibrium stationary states with ratchet effect

2004-10-20

arxiv.org/abs/cond-mat/0410505v2

Phys. Rev. E 71, 036111 (2005)

Physics

Condensed Matter

Statistical Mechanics

4 pages, 5 figures (small changes added)

Scientific paper

10.1103/PhysRevE.71.036111

An ensemble of particles in thermal equilibrium at temperature $T$, modeled by Nos\`e-Hoover dynamics, moves on a triangular lattice of oriented semi-disk elastic scatterers. Despite the scatterer asymmetry a directed transport is clearly ruled out by the second law of thermodynamics. Introduction of a polarized zero mean monochromatic field creates a directed stationary flow with nontrivial dependence on temperature and field parameters. We give a theoretical estimate of directed current induced by a microwave field in an antidot superlattice in semiconductor heterostructures.

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