DIFFUSIVE BEHAVIOR OF ASYMMETRIC ZERO-RANGE PROCESSES

We investigate a new interpretation for the Navier-Stokes corrections to the hydrodynamic equation of asymmetric interacting particle system s. We consider a system that starts from a measure associated with a p rofile that is constant along the drift direction. We show that under diffusive scaling the macroscopic behavior of the process is described by a nonlinear parabolic equation whose diffusion coefficient coincid es with the diffusion coefficient of the hydrodynamic equation of the symmetric version of the process.