Classical diffusion, drift, and trapping in random percolating systems
Physical review. B, Condensed matter1984Vol. 30(1), pp. 489–491
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Abstract
Monte Carlo studies for a biased diffusion are made on simple-cubic random lattices containing ${180}^{3}$ and ${256}^{3}$ sites with time steps up to ${10}^{7}$. Above the percolation threshold, we observe diffusion for short times, and drift for long times, when the bias is below a characteristic value. For larger bias, a very slow relaxation, presumably to the asymptotic nonclassical behavior, is observed.
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