Universality of the Pearcey process
Abstract
Consider non-intersecting Brownian motions on the line leaving from the origin and forced to two arbitrary points. Letting the number of Brownian particles tend to infinity, and upon rescaling, there is a point of bifurcation, where the support of the density of particles goes from one interval to two intervals. In this paper, we show that at that very point of bifurcation a cusp appears, near which the Brownian paths fluctuate like the Pearcey process. This is a universality result within this class of problems. Tracy and Widom obtained such a result in the symmetric case, when the two target points are symmetric with regard to the origin. This asymmetry enabled us to improve considerably a result concerning the non-linear partial differential equations governing the transition probabilities for the Pearcey process, obtained by Adler and van Moerbeke.
Cite
@article{arxiv.0901.4520,
title = {Universality of the Pearcey process},
author = {Mark Adler and Nicolas Orantin and Pierre van Moerbeke},
journal= {arXiv preprint arXiv:0901.4520},
year = {2014}
}