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arxiv: 1211.6400 · v3 · pith:QNMMREQTnew · submitted 2012-11-27 · ❄️ cond-mat.stat-mech · cond-mat.dis-nn

A mean field method with correlations determined by linear response

classification ❄️ cond-mat.stat-mech cond-mat.dis-nn
keywords methodapproximationcorrelationslinearmean-fieldresponseapplyingbethe
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We introduce a new mean-field approximation based on the reconciliation of maximum entropy and linear response for correlations in the cluster variation method. Within a general formalism that includes previous mean-field methods, we derive formulas improving upon, e.g., the Bethe approximation and the Sessak-Monasson result at high temperature. Applying the method to direct and inverse Ising problems, we find improvements over standard implementations.

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