High-precision Monte-Carlo study of the two-dimensional contact process

We investigate the absorbing-state nonequilibrium phase transition in the two-dimensional contact process by means of large-scale Monte-Carlo simulations. We perform spreading runs starting from a single active site in an otherwise inactive host and combine a reweighting technique with a careful extrapolation of the effective exponents to infinite time. This allows us to determine the critical behavior in the two-dimensional directed percolation universality class with unprecedented accuracy.