Dynamics of Repulsion Processes

We study dynamical behaviors of one-dimensional stochastic lattice gases with repulsive interactions whose span can be arbitrary large. We endow the system with a zero-temperature dynamics, so that the hops to empty sites which would have led to the increase of energy are forbidden. We assume that the strength of interactions sufficiently quickly decreases with the separation between the particles, so that interactions can be treated in a lexicographic order. For such repulsion processes with symmetric nearest-neighbor hopping we analytically determine the density-dependent diffusion coefficient. We also compute the variance of the displacement of a tagged particle.