Absence of phase coexistence in disordered exclusion processes with bypassing (CROSBI ID 172130)
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Podaci o odgovornosti
Szavits-Nossan, Juraj ; Uzelac, Katarina
engleski
Absence of phase coexistence in disordered exclusion processes with bypassing
Adding quenched disorder to the one-dimensional asymmetric exclusion process is known to always induce phase separation. To test the robustness of this result, we introduce two modifications of the process that allow particles to bypass defect sites. In the first case, particles are allowed to jump l sites ahead with the probability pl ~ l − (1 + σ), where σ > 1. By using Monte Carlo simulations and the mean-field approach, we show that phase coexistence may be absent up to enormously large system sizes, e.g. lnL ~ 50, but is present in the thermodynamic limit, as in the short-range case. In the second case, we consider the exclusion process on a quadratic lattice with symmetric and totally asymmetric hopping perpendicular to and along the direction of driving, respectively. We show that in an anisotropic limit of this model a regime may be found where phase coexistence is absent.
disordered systems; driven diffusive systems; stationary states
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Podaci o izdanju
2011 (05)
2011.
P05030-1-P05030-18
objavljeno
1742-5468
10.1088/1742-5468/2011/05/P05030