J. Phys. Soc. Jpn. 66, pp. 1962-1975 (1997) [14 Pages]

High-Temperature Dynamics of Spin Glasses

+ Affiliations
1Department of Physics, Tokyo Institute of Technology, Oh-okayama, Meguro-ku, Tokyo 152 2Theoretical Physics, Department of Physics, University of Oxford, 1 Keble Road, Oxford OX1 3NP, United Kingdom

We develop a systematic expansion method of physical quantities for the SK model and the finite-dimensional ± J model of spin glasses in non-equilibrium states. The dynamical probability distribution function is derived from the master equation using a high temperature expansion. We calculate the expectation values of physical quantities from the dynamical probability distribution function. The theoretical curves show satisfactory agreement with Monte Carlo simulation results in the appropriate temperature and time regions. A comparison is made with the results of a dynamics theory by Coolen, Laughton and Sherrington.

©1997 The Physical Society of Japan