Hopping motion of lattice gases through nonsymmetric potentials under strong bias conditions

Details Hopping motion of lattice gases through nonsymmetric potentials under strong bias conditions Hopping motion of lattice gases through nonsymmetric potentials under strong bias conditions

1999-09-10

arxiv.org/abs/cond-mat/9909154v1

Phys. Rev. E 61, 2319-2326 (2000)

Physics

Condensed Matter

Statistical Mechanics

8 pages (incl. 6 eps figures); RevTeX 3.1

Scientific paper

10.1103/PhysRevE.61.2319

The hopping motion of lattice gases through potentials without mirror-reflection symmetry is investigated under various bias conditions. The model of 2 particles on a ring with 4 sites is solved explicitly; the resulting current in a sawtooth potential is discussed. The current of lattice gases in extended systems consisting of periodic repetitions of segments with sawtooth potentials is studied for different concentrations and values of the bias. Rectification effects are observed, similar to the single-particle case. A mean-field approximation for the current in the case of strong bias acting against the highest barriers in the system is made and compared with numerical simulations. The particle-vacancy symmetry of the model is discussed.

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