Novel Quenched Disorder Fixed Point in a Two-Temperature Lattice Gas

Details Novel Quenched Disorder Fixed Point in a Two-Temperature Lattice Gas Novel Quenched Disorder Fixed Point in a Two-Temperature Lattice Gas

1996-12-12

arxiv.org/abs/cond-mat/9612124v1

Physics

Condensed Matter

Statistical Mechanics

11 pages, no figures, RevTex

Scientific paper

10.1209/epl/i1997-00191-8

We investigate the effects of quenched randomness on the universal properties of a two-temperature lattice gas. The disorder modifies the dynamical transition rates of the system in an anisotropic fashion, giving rise to a new fixed point. We determine the associated scaling form of the structure factor, quoting critical exponents to two-loop order in an expansion around the upper critical dimension d$_c=7$. The close relationship with another quenched disorder fixed point, discovered recently in this model, is discussed.

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