Séminaires : Séminaire d'Algèbres d'Opérateurs

Equipe(s) : ao,
Responsables :Pierre Fima, François Le Maître, Romain Tessera
Email des responsables :
Salle : 1013
Adresse :Sophie Germain

Orateur(s) Tey Berendschot - KU Leuven,
Titre Phase transitions for nonsingular Bernoulli actions
Horaire14:00 à 15:00
RésumeGiven a nonsingular Bernoulli action, we construct a one-parameter family of nonsingular Bernoulli actions, indexed by t in [0,1]. For t=1 we retrieve the nonsingular Bernoulli action we started with, and for t=0 we obtain a measure preserving Bernoulli action. In this setting we prove the existence of a phase transition for (strong) ergodicity. When the nonsingular Bernoulli action arises from a group acting on a locally finite tree, we are able to compute the precise phase transition value.
AdresseSophie Germain