Nonlocal competition and front propagation in branching-coalescence systems

Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Apr;75(4 Pt 1):042901. doi: 10.1103/PhysRevE.75.042901. Epub 2007 Apr 11.

Abstract

The spatial invasion of a stable into an unstable phase is studied for the branching-coalescence process with nonlocal competition. Numerical experiments show that the threshold at the front leading edge, introduced by the discreteness of the reactants, allows for the nonlocal competition to affect the front velocity. However, the front still moves ballistically after a short transient period for any finite range competition length.