CRITICAL AND SCALING PROPERTIES OF CLUSTER DISTRIBUTIONS IN NONEQUILIBRIUM ISING-LIKE SYSTEMS

We report on analytical and Monte Carlo studies of d-dimensional noneq uilibrium stochastic lattice systems whose dynamical rule incorporates various symmetries. We find that critical behavior is of the Ising va riety, and that the cluster distribution has scaling properties propos ed earlier for the equilibrium system, and give estimates for the expo nents that characterize clusters for d = 2. The scaling region is nota bly larger than the corresponding one for the equilibrium case; ramifi ed percolating clusters do not occur below the critical point.