Before revision:  By mimicking a local structural change in the lattice, these sites interact with particles and strongly influence their transport phenomenology. We analyze the case of a single dynamical site whose dynamics is cou- pled with the density of particles on the lattice; we investigate the phenomenology of the model and how the current-density relationship is affected by the dynamical defect.
After revision:  We investigate the phenomenology of the model and how the current-density relationship is affected by the dynamical defect.