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Reaction-diffusion lattice gas: Theory and computer results
Alonso Pereda, Juan José; Marro, Joaquín; González-Miranda, J. M. (Jesús Manuel)
Universitat de Barcelona
We report on the study of nonequilibrium ordering in the reaction-diffusion lattice gas. It is a kinetic model that relaxes towards steady states under the simultaneous competition of a thermally activated creation-annihilation $(reaction$) process at temperature T, and a diffusion process driven by a heat bath at temperature T?T. The phase diagram as one varies T and T, the system dimension d, the relative priori probabilities for the two processes, and their dynamical rates is investigated. We compare mean-field theory, new Monte Carlo data, and known exact results for some limiting cases. In particular, no evidence of Landau critical behavior is found numerically when d=2 for Metropolis rates but Onsager critical points and a variety of first-order phase transitions.
Simulació per ordinador
Processos irreversibles
Termodinàmica del desequilibri
Transformacions de fase (Física estadística)
Computer simulation
Irreversible processes
Nonequilibrium thermodynamics
Phase transformations (Statistical physics)
(c) American Physical Society, 1993
The American Physical Society

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