title: Directed random walks on directed percolation clusters.
abstract: The characteristics of directed random walks on directed percolation clusters are numerically studied. For two-dimensional clusters grown at the critical probability p(c), it is shown that the distance d of the directed random walkers from their most probable end point is determined by a probability distribution p(d) approximately d(-(1+w/nu)), where the values of w and nu are close to the values of the known exponents: w approximately 0.50 and nu approximately 0.63. This probability distribution is independent of the cluster's length t up to d values comparable to the cluster's width approximately t(nu). The results are shown to be consistent with a tree description of the directed percolation clusters.
authors.affiliation: Minerva Center and Department of Physics, Bar-Ilan University, 52900 Ramat-Gan, Israel.
authors.forename: Xiao-Hong
authors.initials: XH
authors.lastname: Wang
authors.forename: Ehud
authors.initials: E
authors.lastname: Perlsman
authors.forename: Shlomo
authors.initials: S
authors.lastname: Havlin