Condensation in the zero range process: stationary and dynamical properties

Details Condensation in the zero range process: stationary and dynamical properties Condensation in the zero range process: stationary and dynamical properties

2003-02-04

arxiv.org/abs/cond-mat/0302079v2

J. Stat. Phys. 113(3/4), 389-410 (2003)

Physics

Condensed Matter

Statistical Mechanics

22 pages, 4 figures, to appear in J. Stat. Phys.; improvement of presentation and content of Theorem 2, added references

Scientific paper

The zero range process is of particular importance as a generic model for domain wall dynamics of one-dimensional systems far from equilibrium. We study this process in one dimension with rates which induce an effective attraction between particles. We rigorously prove that for the stationary probability measure there is a background phase at some critical density and for large system size essentially all excess particles accumulate at a single, randomly located site. Using random walk arguments supported by Monte Carlo simulations, we also study the dynamics of the clustering process with particular attention to the difference between symmetric and asymmetric jump rates. For the late stage of the clustering we derive an effective master equation, governing the occupation number at clustering sites.

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