Exact correlation functions in an asymmetric exclusion model with open boundaries

Asymmetric exclusion models are systems of particles hopping in a preferred direction with hard core interactions. Exact expressions for the average occupations have pre- viously been derived in the one dimensional fully asymmetric case with open boundaries. Gen- eralisations of these expressions are presented for all correlation functions. We discuss several continuous limits of the twc-point correlation functions and show that due to the boundary conditions, long range correlations persist in the bulk. We also discuss the presence of these long range correlations in a related growth model.