HYDRODYNAMICAL LIMIT FOR SPACE INHOMOGENEOUS ONE-DIMENSIONAL TOTALLY ASYMMETRIC ZERO-RANGE PROCESSES

We consider totally asymmetric attractive zero-range processes with bo unded jump rates on Z. In order to obtain a lower bound for the large deviations from the hydrodynamical limit of the empirical measure, we perturb the process in two ways. We first choose a finite number of si tes and slowdown the jump rate at these sites. We prove a hydrodynamic al limit for this perturbed process and show the appearance of Dirac m easures on the sites where the rates are slowed down. The second type of perturbation consists of choosing a finite number of particles and making them jump at a slower rate. In these cases the hydrodynamical l imit is described by nonentropy weak solutions of quasilinear first-or der hyperbolic equations. These two results prove that the large devia tions for asymmetric processes with bounded jump rates are of order at least e(-CN). All these results can be translated to the context of t otally asymmetric simple exclusion processes where a finite number of particles or a finite number of holes jump at a slower rate.