NONEQUILIBRIUM RELAXATION OF THE 3D + -J EA MODEL/

By studying correlation functions of two replicas with the damage spre ading method, the spin glass transition temperature of the 3D +/- J EA model is evaluated by using Campbell's criterion D(T-g, t --> infinit y) = 1/2 or q(d)(AB)(T-g,t --> infinity) = 0, where D and q(d)(AB) are the Hamming distance and the overlap of the two replicas, respectivel y. The two replicas evolve with the same series of the random numbers and with initial spin-configurations related to each other by S-i(A)(t = 0) = -S-i(B)(t = 0) (for all i). From our simulational data for sys tem sizes up to L = 64, the spin glass transition temperature is estim ated as T-g = 1.18 +/- 0.06. The replica simulational method and the d amage spreading method are compared with each other. The relaxation ex ponents of the magnetization and the correlation functions are also es timated in the vicinity of T-g on a large lattice and the dynamical cr itical exponent z is estimated as z similar or equal to 6.0.