Critical behavior for mixed site-bond directed percolation
Abstract
We study mixed site-bond directed percolation on 2D and 3D lattices by using time-dependent simulations. Our results are compared with rigorous bounds recently obtained by Liggett and by Katori and Tsukahara. The critical fractions psitec and pbondc of sites and bonds are extremely well approximated by a relationship reported earlier for isotropic percolation, ( psitec/ psitec*+ pbondc/ pbondc* = 1) , where psitec* and pbondc* are the critical fractions in pure site and bond directed percolation.
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