Abstract
We study the shock structures in three-states one-dimensional driven-diffusive systems withnearest-neighbour interactions using a matrix product formalism. We consider thecases in which the stationary probability distribution function of the system canbe written in terms of the superposition of product shock measures. We showthat only three families of three-states systems have this property. In each casethe shock performs a random walk provided that some constraints are fulfilled.We calculate the diffusion coefficient and drift velocity of shock for each family.
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