RANDOM-WALKS IN PERCOLATING NETWORKS WITH 2 JUMP FREQUENCIES

The time dependence of the mean-squared displacement of a random walker on a random network is studied, for the case that there are two very different jump probabilities and that the concentration of the better conducting bond is close to percolation. A scaling theory is proposed and discussed, and numerical simulations of the three-dimensional bond problem are used to verify the scaling predictions. © 1990 The American Physical Society.