Contact processes with long-range interactions

Details Contact processes with long-range interactions Contact processes with long-range interactions

2006-06-16

arxiv.org/abs/cond-mat/0606450v3

J. Stat. Mech. P08008 (2006).

Physics

Condensed Matter

Statistical Mechanics

Accepted with minor revisions by Journal of Statistical Mechanics: Theory and experiments

Scientific paper

10.1088/1742-5468/2006/08/P08008

A class of non-local contact processes is introduced and studied using mean-field approximation and numerical simulations. In these processes particles are created at a rate which decays algebraically with the distance from the nearest particle. It is found that the transition into the absorbing state is continuous and is characterized by continuously varying critical exponents. This model differs from the previously studied non-local directed percolation model, where particles are created by unrestricted Levy flights. It is motivated by recent studies of non-equilibrium wetting indicating that this type of non-local processes play a role in the unbinding transition. Other non-local processes which have been suggested to exist within the context of wetting are considered as well.

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