Novel position-space renormalization group for bond directed percolation in two dimensions

A new position-space renormalization group approach is investigated for bond directed percolation in two dimensions. The threshold value for the bond occupation probabilities is found to be pc=0.6443. Correlation length exponents on time (parallel) and space (transverse) directions are found to be ν =1.719 and ν =1.076, respectively, which are in very good agreement with the best-known series expansion results.