Multiple-transit paths and density correlation functions in PASEP

Details Multiple-transit paths and density correlation functions in PASEP Multiple-transit paths and density correlation functions in PASEP

2010-06-09

arxiv.org/abs/1006.1877v1

Physics

Condensed Matter

Statistical Mechanics

7 pages, REVTEX, 3 figures

Scientific paper

We consider the partially asymmetric simple exclusion process (PASEP) when its steady-state probability distribution function can be written in terms of a linear superposition of product measures with a finite number of shocks. In this case the PASEP can be mapped into an equilibrium walk model, defined on a diagonally rotated square lattice, in which each path of the walk model has several transits with the horizontal axis. We particularly show that the multiple-point density correlation function in the PASEP is related to the probability that a path has multiple contacts with the horizontal axis from the above or below.

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