论文信息 - Monte Carlo simulation of very large kinetic Ising models

Monte Carlo simulation of very large kinetic Ising models

We study the relaxation of Ising models in three and four dimensions aboveTc, using multi-spin coding for lattices up to 3603 and 404. The nonlinear relaxation time diverges as (T−Tc)−1.05±0.04 in three dimensions, where corrections to scaling are taken into account. In four dimensions the effective exponent is about 0.72; logarithmic correction factors make the analysis difficult here. The linear relaxation time for the asymptotic exponential decay is found to be larger, with effective exponents 1.31 (d=2) and 0.97 (d=4). The difference in the linear and nonlinear relaxation exponents is compatible in three dimensions with the orderparameter exponent β, as predicted by Racz.

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