D. Lancaster et al., WEIGHTED MEAN-FIELD THEORY FOR THE RANDOM-FIELD ISING-MODEL, Journal of physics. A, mathematical and general, 28(14), 1995, pp. 3959-3973
We consider the mean-held theory of the random field Ising model obtai
ned by weighing the many solutions of the mean-field equations with Bo
ltzmann-like factors. These solutions are found numerically in three d
imensions and we observe critical behaviour arising from the weighted
sum. We estimate the exponents.