Conférencier

Alexander Fribergh

Université Paul Sabatier

Toulouse, France

We will focus on recent results in the field of random walks in random environments.The aim of this field is to study the long time behavior of a particle moving in random landscape.

One aspect of random walks in random environments that has attracted a lot of attention in recent years is to understand models in which we observe trapping phenomena. In those models, small pockets in the random landscape have a big impact on the behavior of the walk. This translates into a host of anomalous results for the long time behavior of the walk.

Biased random walks on random graphs is a natural model to observe trapping. Our main focus will be to present results on biased random walks on random trees (Galton-Watson trees) and in a random labyrinth (percolation cluster).

Date :              Mardi le 7 janvier 2014

Heure :            11h30 à 12h30

Lieu :               Pavillon André-Aisenstadt

Salle :              5340