Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2005-01-14
J. Phys. A: Math. Gen. 38 (2005) R195-R239
Physics
Condensed Matter
Statistical Mechanics
54 pages, 9 figures, review article
Scientific paper
10.1088/0305-4470/38/19/R01
We review recent progress on the zero-range process, a model of interacting particles which hop between the sites of a lattice with rates that depend on the occupancy of the departure site. We discuss several applications which have stimulated interest in the model such as shaken granular gases and network dynamics, also we discuss how the model may be used as a coarse-grained description of driven phase-separating systems. A useful property of the zero-range process is that the steady state has a factorised form. We show how this form enables one to analyse in detail condensation transitions, wherein a finite fraction of particles accumulate at a single site. We review condensation transitions in homogeneous and heterogeneous systems and also summarise recent progress in understanding the dynamics of condensation. We then turn to several generalisations which also, under certain specified conditions, share the property of a factorised steady state. These include several species of particles; hop rates which depend on both the departure and the destination sites; continuous masses; parallel discrete-time updating; non-conservation of particles and sites.
Evans Martin R.
Hanney T.
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