Francesco Turci, Andrea Parmeggiani, Estelle Pitard, M. Carmen Romano, Luca Ciandrini
Inspired by biological processes such as protein synthesis and motor protein transport, we intro- duce the concept of localized dynamical sites coupled to a driven lattice gas dynamics. 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. Crucially, we find a novel dynamical regime characterized by an intermittent current and subject to severe finite-size effects that can enhance the transport at high particle densities. We describe and rationalize the variety of regimes via refined mean-field approaches.
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http://arxiv.org/abs/1207.1804
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