6533b85efe1ef96bd12bfb2d

RESEARCH PRODUCT

Quenched and annealed free energies

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description

This paper gives a simple exposition of the Nishimori method to solve certain quenched, random bond spin-glass models. It allows a transparent physical interpretation in terms of annealed systems. As an application a special solution of the Sherrington-Kirkpatrick model with a discrete probability distribution is obtained and shown to agree with the solution for the Gaussian case. This substantiates the claim that the averaged free energy does not depend on the details of the probability distribution Expose simple de la methode de Nishimori pour resoudre certains modeles de verres de spin avec interactions aleatoires. Interpretation transparente en termes de systemes recuits. Presentation d'une solution particuliere du modele de Sherrington et Kirkpatrick dans le cas ou la distribution de probabilite est discrete, le resultat coincidant avec celui du cas de la distribution gaussienne (donc l'energie libre moyenne ne deprendrait pas des details de la distribution de probabilite)