Limiting laws of supercritical branching random walks

Julien Barral (1) , Rémi Rhodes (2) , Vincent Vargas (2)

1 LAGA - Laboratoire Analyse, Géométrie et Applications
2 CEREMADE - CEntre de REcherches en MAthématiques de la DEcision

In this note, we make explicit the law of the renormalized supercritical branching random walk, giving credit to a conjecture formulated in a previous works of the authors for a continuous analog of the branching random walk. In particular, we express the law of the corresponding limiting renormalized Gibbs measures, confirming, in this discrete model, conjectures formulated by physicists about the Poisson-Dirichlet nature of the jumps in the limit.

Mots clés: branching random walk; supercritical

Domaines: Probabilités [math.PR]

Julien Barral, Rémi Rhodes, Vincent Vargas. Limiting laws of supercritical branching random walks. 2012. ⟨hal-00682212v1⟩