Novel quenched disorder fixed point in a two-temperature lattice gas

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1997 EDP Sciences
, , Citation B. Schmittmann and C. A. Laberge 1997 EPL 37 559 DOI 10.1209/epl/i1997-00191-8

0295-5075/37/8/559

Abstract

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 dc = 7. The close relationship with another quenched disorder fixed point, discovered recently in this model, is discussed.

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10.1209/epl/i1997-00191-8