Nonexponential relaxation of Ising models within the droplet picture

We develop a unified droplet description for the low temperature phase of various Ising systems in order to explain their slow relaxation phenomena. For the equilibrium autocorrelation function we find log c(t)∼-tn behaviour where n depends only on the type of randomness and on the dimension (0 < n < 1). This decay function holds even in the so-called Griffiths phase for intermediate times.