We investigate the totally asymmetrical simple exclusion process (TASEP) in the presence of a bottleneck, i.e. a sequence of consecutive defect sites with reduced hopping rate. The influence of such a bottleneck on the phase diagram is studied by computer simulations and a novel analytical...

We consider an interacting particle system residing in the sites of a regular lattice and evolving according to a stochastic dynamics. Our dynamics is constituted by Markovian processes which possess the same symmetries of the three-state Potts model. Each site of the lattice can be in three...