Thermodynamical Limit for Correlated Gaussian Random Energy Models |
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Authors: | P Contucci M Degli Esposti C Giardinà S Graffi |
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Institution: | 1.Dipartimento di Matematica, Università di Bologna, 40127 Bologna, Italy. E-mail: {contucci,desposti,giardina,graffi}@dm.unibo.it,IT |
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Abstract: | Let {E Σ (N)} ΣΣN be a family of |Σ N |=2 N centered unit Gaussian random variables defined by the covariance matrix C N of elements c N (Σ,τ):=Av(E Σ (N)E τ (N)) and the corresponding random Hamiltonian. Then the quenched thermodynamical limit exists if, for every decomposition N=N 1 +N 2 , and all pairs (Σ,τ)Σ N ×Σ N : where π k (Σ),k=1,2 are the projections of ΣΣ N into Σ Nk . The condition is explicitly verified for the Sherrington-Kirkpatrick, the even p-spin, the Derrida REM and the Derrida-Gardner GREM models. |
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