Vincent Danos University of Edinburgh Title: Statistical physics of communicating processes Abstract: We propose a probabilistic interpretation of a class of reversible communicating processes. The rates of forward and backward computing steps, instead of being given explicitly, are derived from a set of formal energy parameters. This is similar to the Metropolis-Hastings algorithm but in a distributed context. We find that with the right definition of the energy landscape, a specific lower bound on the cost of communication will guarantee that a process reaches a probabilistic equilibrium state and hits a success state in finite average time, if there is one.