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oai:recercat.cat:2445/188292025-12-04T20:41:35Zcom_2072_1057col_2072_478822col_2072_478917

Reaction-diffusion lattice gas: Theory and computer results Alonso Pereda, Juan José Marro, Joaquín, 1945- González-Miranda, J. M. (Jesús Manuel) Simulació per ordinador Processos irreversibles Termodinàmica del desequilibri Transformacions de fase (Física estadística) Computer simulation Irreversible processes Nonequilibrium thermodynamics Phase transformations (Statistical physics) 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. 2011-07-07T12:53:35Z 2011-07-07T12:53:35Z 1993 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.47.885 Physical Review e, 1993, vol. 47, núm. 2, p. 885-898 http://dx.doi.org/10.1103/PhysRevE.47.885 (c) American Physical Society, 1993 info:eu-repo/semantics/openAccess The American Physical Society Articles publicats en revistes (Física de la Matèria Condensada)