The Kac limit for finite-range spin glasses

Details The Kac limit for finite-range spin glasses The Kac limit for finite-range spin glasses

2003-10-15

arxiv.org/abs/cond-mat/0310356v2

Phys. Rev. Lett. 92, 030602 (2004)

Physics

Condensed Matter

Statistical Mechanics

4 pages; references updated, typos corrected

Scientific paper

10.1103/PhysRevLett.92.030602

We consider a finite range spin glass model in arbitrary dimension, where the strength of the two-body coupling decays to zero over some distance $\gamma^{-1}$. We show that, under mild assumptions on the interaction potential, the infinite-volume free energy of the system converges to that of the Sherrington-Kirkpatrick one, in the Kac limit $\gamma\to0$. This could be a first step toward an expansion around mean field theory, for spin glass systems.

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