Effects of differential mobility on biased diffusion of two species

Details Effects of differential mobility on biased diffusion of two species Effects of differential mobility on biased diffusion of two species

2003-02-12

arxiv.org/abs/cond-mat/0302232v1

Physics

Condensed Matter

Statistical Mechanics

15 pages, 4 figures

Scientific paper

10.1088/0305-4470/36/18/302

Using simulations and a simple mean-field theory, we investigate jamming transitions in a two-species lattice gas under non-equilibrium steady-state conditions. The two types of particles diffuse with different mobilities on a square lattice, subject to an excluded volume constraint and biased in opposite directions. Varying filling fraction, differential mobility, and drive, we map out the phase diagram, identifying first order and continuous transitions between a free-flowing disordered and a spatially inhomogeneous jammed phase. Ordered structures are observed to drift, with a characteristic velocity, in the direction of the more mobile species.

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