Directed diffusion in a percolation network

摘要: The authors investigate diffusion of particles in a random medium the presence an external field. is modelled by percolation network on which particle executes walk with unequal transition probabilities along and against biasing In one dimension where there are only finite clusters, they study how bias affects long-time approach to steady state. higher dimensions, current-carrying state above threshold. They show that drift velocity non-monotonic vanishes for large enough values