Arndt, P.F; Dahmen, S.R; Hinrichsen, H - In: Physica A: Statistical Mechanics and its Applications 295 (2001) 1, pp. 128-131
In the directed percolation model we consider the probability p of having an open bond as a complex parameter. We show that the roots of the survival probability PN(p) for a square lattice of N rows distribute themselves in a fractal manner in the complex p-plane. These roots have an...