Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2000-09-27
Eur. Phys. J. B 20, 217 (2001)
Physics
Condensed Matter
Disordered Systems and Neural Networks
23 pages, 6 figures
Scientific paper
10.1007/PL00011099
So far the problem of a spin glass on a Bethe lattice has been solved only at the replica symmetric level, which is wrong in the spin glass phase. Because of some technical difficulties, attempts at deriving a replica symmetry breaking solution have been confined to some perturbative regimes, high connectivity lattices or temperature close to the critical temperature. Using the cavity method, we propose a general non perturbative solution of the Bethe lattice spin glass problem at a level of approximation which is equivalent to a one step replica symmetry breaking solution. The results compare well with numerical simulations. The method can be used for many finite connectivity problems appearing in combinatorial optimization.
Mezard Marc
Parisi Giorgio
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