Critical dynamics of diluted Ising systems

Three different calculations are carried out to treat the low-temperature dynamics in diluted d-dimensional Ising systems near the percolation threshold. All three use recursive methods based on a domain-wall--diffusion picture. The standard form of bicritical dynamic scaling is found to be violated for d>1. A quadratic dependence of the logarithm of the characteristic decay time on the logarithm of the correlation length is found and related to recent experimental work.