High Temperature Asymptotics of Orthogonal Mean-Field Spin Glasses
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Abstract
We evaluate the high temperature limit of the free energy of spin glasses on the hypercube with Hamiltonian \(H_N({\underline{\sigma }}) = {\underline{\sigma }}^T J {\underline{\sigma }}\), where the coupling matrix J is drawn from certain symmetric orthogonally invariant ensembles. Our derivation relates the annealed free energy of these models to a spherical integral, and expresses the limit of the free energy in terms of the limiting spectral measure of the coupling matrix J. As an application, we derive the limiting free energy of the random orthogonal model at high temperatures, which confirms non-rigorous calculations of Marinari et al. (J Phys A 27:7647, 1994). Our methods also apply to other well-known models of disordered systems, including the SK and Gaussian Hopfield models.
Keywords
Large deviations Random orthogonal matrices Spherical integrals Spin glassesMathematics Subject Classification
60F10 15B10 82B44Notes
Acknowledgments
The authors thank Amir Dembo, Andrea Montanari and Sourav Chatterjee for helpful discussions. S.S. thanks Zhou Fan for help with results about random matrices. S.S. was supported by a William R. and Sara Hart Kimball Stanford Graduate Fellowship. The authors also thank an anonymous referee for carefully reading the manuscript and for providing valuable comments which improved the presentation of the paper.
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