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Phase transitions in the Potts spin-glass model Franzese, Giancarlo Coniglio, Antonio, 1940- Model d'Ising Transformacions de fase (Física estadística) Mecànica estadística Ising model Phase transformations (Statistical physics) Statistical mechanics We have studied the Potts spin glass with two-state Ising spins and s -state Potts variables using a cluster Monte Carlo dynamics. The model recovers the ± J Ising spin glass (SG) for s = 1 and exhibits for all s a SG transition at T SG ( s ) and a percolation transition at higher temperature T p ( s ) . We have shown that for all values of s ≠ 1 at T p ( s ) there is a thermodynamic transition in the universality class of a ferromagnetic s -state Potts model. The efficiency of the cluster dynamics is compared with that of standard spin-flip dynamics. 2011-07-07T12:54:26Z 2011-07-07T12:54:26Z 1998 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: http://dx.doi.org/10.1103/PhysRevE.58.2753 Physical Review E, 1998, vol. 58, núm. 3, p. 2753-2759 http://dx.doi.org/10.1103/PhysRevE.58.2753 (c) American Physical Society, 1998 info:eu-repo/semantics/openAccess The American Physical Society Articles publicats en revistes (Física de la Matèria Condensada)