98-540 Stefano Ghirlanda and Francesco Guerra
General properties of overlap probability distributions in disordered spin systems. Toward Parisi ultrametricity. (24K, LaTeX 2e) Jul 24, 98
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Abstract. For a very general class of probability distributions in disordered Ising spin systems, in the thermodynamical limit, we prove the following property for overlaps among real replicas. Consider the overlaps among s replicas. Add one replica s+1. Then, the overlap q(a,s+1) between one of the first s replicas, let us say a, and the added s+1 is either independent of the former ones, or it is identical to one of the overlaps q(a,b), with b running among the first s replicas, excluding a. Each of these cases has equal probability 1/s.

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