DIFFUSION OF LATTICE GASES WITHOUT DOUBLE OCCUPANCY ON 3-DIMENSIONAL PERCOLATION LATTICES

We examined the diffusion of lattice gases, where double occupancy of sites is excluded, on three-dimensional percolation lattices at the percolation threshold pc. The critical exponent for the root-mean-square displacement was determined to be k=0.183±0.010, which is similiar to the result of Roman for the problem of the "ant in the labyrinth." Furthermore, we found a plateau value for k at intermediate times for systems with higher concentrations of lattice gas particles. © 1990 Plenum Publishing Corporation.