Dynamics of a planar Coulomb gas

Abstract : We study the long-time behavior of the dynamics of interacting planar Brow-nian particles, confined by an external field and subject to a singular pair repulsion. The invariant law is an exchangeable Boltzmann – Gibbs measure. For a special inverse temperature, it matches the Coulomb gas known as the complex Ginibre ensemble. The difficulty comes from the interaction which is not convex, in contrast with the case of one-dimensional log-gases associated with the Dyson Brownian Motion. Despite the fact that the invariant law is neither product nor log-concave, we show that the system is well-posed for any inverse temperature and that Poincaré inequalities are available. Moreover the second moment dynamics turns out to be a nice Cox – Ingersoll – Ross process in which the dependency over the number of particles leads to identify two natural regimes related to the behavior of the noise and the speed of the dynamics.
Type de document :
Pré-publication, Document de travail
Minor modification. 2017
Liste complète des métadonnées

Littérature citée [44 références]  Voir  Masquer  Télécharger

Contributeur : Djalil Chafaï <>
Soumis le : jeudi 20 juillet 2017 - 18:42:03
Dernière modification le : mercredi 21 mars 2018 - 18:56:49


Fichiers produits par l'(les) auteur(s)


  • HAL Id : hal-01546288, version 2
  • ARXIV : 1706.08776


François Bolley, Djalil Chafai, Joaquín Fontbona. Dynamics of a planar Coulomb gas. Minor modification. 2017. 〈hal-01546288v2〉



Consultations de la notice


Téléchargements de fichiers