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Local Mean Field Dynamics of Ising Spin Glasses

(Received 6 June 1994, revised 6 October, accepted 10 October 1994)

Abstract
The Glauber dynamics of three-dimensional Ising spin glasses are studied numerically in the local mean field approximation. The aging effect is observed in both field cooled and zero field cooled regimes but the remanent magnetization never reaches true equilibrium. The dynamic susceptibility behaves like in experiments. A double peak structure in the real part of the susceptibility plotted as a function of temperature may appear for non-symmetric distributions of the exchange couplings. This, however, does not indicate reentrancy. The temperature dependence of the dynamic specific heat is opposite to that found theoretically in small clusters.