2026-04-17T03:54:54Zhttps://recercat.cat/oai/request

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

00925njm 22002777a 4500 dc Alonso Pereda, Juan José author Marro, Joaquín, 1945- author González-Miranda, J. M. (Jesús Manuel) author 2011-07-07T12:53:35Z 2011-07-07T12:53:35Z 1993 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) Reaction-diffusion lattice gas: Theory and computer results