Derivation of the stochastic Burgers equation from totally asymmetric interacting particle systems

Abstract

We consider equilibrium fluctuations for a class of totally asymmetric zero-range type interacting particle systems, which is particularly related to q-totally asymmetric simple exclusion processes (q-TASEPs). As a main result, we show that density fluctuation of our process converges to the stationary energy solution of the stochastic Burgers equation. Our proof is based on the second-order Boltzmann–Gibbs principle and a Taylor expansion argument.