Entropy production in the majority-vote model

We analyzed the entropy production in the majority-vote model by using a mean-field approximation and Monte Carlo simulations. The dynamical rules of the model do not obey detailed balance so that entropy is continuously being produced. This nonequilibrium stochastic model is known to have a critical behavior belonging to the universality class of the equilibrium Ising model. We show that the entropy production also exhibits a singularity at the critical point similar to the one occurring in the entropy, or the energy, of the equilibrium Ising model.