The effect of detachment and attachment to a kink motion in the asymmetric simple exclusion process

Details The effect of detachment and attachment to a kink motion in the asymmetric simple exclusion process The effect of detachment and attachment to a kink motion in the asymmetric simple exclusion process

2006-06-12

arxiv.org/abs/cond-mat/0606277v1

Physics

Condensed Matter

Statistical Mechanics

10 pages, 5 figures

Scientific paper

10.1088/0305-4470/39/49/002

We study the dynamics of a kink in a one-lane asymmetric simple exclusion process with detachment and attachment of the particle at arbitrary sites. For a system with one site of detachment and attachment we find that the kink is trapped by the site, and the probability distribution of the kink position is described by the overdumped Fokker-Planck equation with a V-shaped potential. Our results can be applied to the motion of a kink in arbitrary number of sites where detachment and attachment take place. When detachment and attachment take place at every site, we confirm that the kink motion obeys the diffusion in a harmonic potential. We compare our results with the Monte Carlo simulation, and check the quantitative validity of our theoretical prediction of the diffusion constant and the potential form.

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