THERMALLY ACTIVATED DIFFUSION ALONG ONE-DIMENSIONAL CHAINS WITH ENERGETIC DISORDER - ANALYSIS OF COMPUTER-SIMULATION DATA

Recent results on the computer simulations of thermally activated diff usion along one-dimensional chains with energetic disorder are analyze d theoretically. The analysis has enabled us to assign the numerical d ata to the particular stage of the diffusion process and to approximat e the temporal behavior of the mean-square displacement during this st age by a simple analytical expression. Our results suggest a universal time-dependence of the relative diffusion coefficient at very low tem peratures and provide the explicit form of this dependence for a wide class of distributions used for the description of energetic disorder. (C) 1997 Elsevier Science B.V.