Central limit theorem for fluctuations in the high temperature region of the Sherrington-Kirkpatrick spin glass model

Details Central limit theorem for fluctuations in the high temperature region of the Sherrington-Kirkpatrick spin glass model Central limit theorem for fluctuations in the high temperature region of the Sherrington-Kirkpatrick spin glass model

2002-01-08

arxiv.org/abs/cond-mat/0201092v3

J. Math. Phys. 43, 6224 (2002)

Physics

Condensed Matter

Disordered Systems and Neural Networks

18 pages

Scientific paper

10.1063/1.1515109

In a region above the Almeida-Thouless line, where we are able to control the thermodynamic limit of the Sherrington-Kirkpatrick model and to prove replica symmetry, we show that the fluctuations of the overlaps and of the free energy are Gaussian, on the scale N^{-1/2}, for N large. The method we employ is based on the idea, we recently developed, of introducing quadratic coupling between two replicas. The proof makes use of the cavity equations and of concentration of measure inequalities for the free energy.

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