Further evidence of the absence of Replica Symmetry Breaking in Random Bond Potts Models

Details Further evidence of the absence of Replica Symmetry Breaking in Random Bond Potts Models Further evidence of the absence of Replica Symmetry Breaking in Random Bond Potts Models

1999-05-27

arxiv.org/abs/cond-mat/9905401v2

Physics

Condensed Matter

Statistical Mechanics

7 pages, some minor modifications (mainly misprints). To Appear in Europhysics Letters

Scientific paper

10.1209/epl/i1999-00534-y

In this short note, we present supporting evidence for the replica symmetric approach to the random bond q-state Potts models. The evidence is statistically strong enough to reject the applicability of the Parisi replica symmetry breaking scheme to this class of models. The test we use is a generalization of one formerly proposed by Dotsenko et al. and consists in measuring scaling laws of disordered-averaged moments of the spin-spin correlation functions. Numerical results, obtained via Monte Carlo simulations for several values of q, are shown to be in fair agreement with the replica symmetric values computed by using perturbative CFT for the second and third moments of the q=3 model. RSB effects, which should increase in strength with moment, are unobserved.

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