Braz. J. Phys. vol.30 número4

ritial behavior is haraterized at high magneti onentrations..

body transverse Ising model with random bonds and elds. The ouplings and the magneti elds are

transition in suh a model, and study the orresponding ritial temperature as the spin value ande. the

the master equation on the phase spae, and the evolution of loal and global spin autoorrelation.. funtions, in terms of independent relaxation modes, whih are eigenvetors of the

We propose an improvement of a Monte Carlo method designed to treat the Ising model in a

We alulate the spatial and temperature dependenes of various spin orre-.. lation funtions, as well as the wave-vetor dependene of the spin suseptibility for

relations has been applied to obtain the time evolution of a non-ommuting spin

The kineti Ising model on an n-isotopi hain is onsidered in the framework of Glauber dynamis.. The hain is omposed of N segments with n sites, eah one oupied by a