Density profiles in the raise and peel model with and without a wall. Physics and combinatorics

Details Density profiles in the raise and peel model with and without a wall. Physics and combinatorics Density profiles in the raise and peel model with and without a wall. Physics and combinatorics

2007-09-28

arxiv.org/abs/0709.4575v2

J. Stat. Mech. (2008) P01006

Physics

Condensed Matter

Statistical Mechanics

39 pages, 28 figures

Scientific paper

We consider the raise and peel model of a one-dimensional fluctuating interface in the presence of an attractive wall. The model can also describe a pair annihilation process in a disordered unquenched media with a source at one end of the system. For the stationary states, several density profiles are studied using Monte Carlo simulations. We point out a deep connection between some profiles seen in the presence of the wall and in its absence. Our results are discussed in the context of conformal invariance ($c = 0$ theory). We discover some unexpected values for the critical exponents, which were obtained using combinatorial methods. We have solved known (Pascal's hexagon) and new (split-hexagon) bilinear recurrence relations. The solutions of these equations are interesting on their own since they give information on certain classes of alternating sign matrices.

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