Research Group
About us: We are a research group based in Innsbruck, in the middle of the Austrian Alps. The Department of Mathematics at the University of Innsbruck provides an inspiring research environment in probability theory, combined with the unique advantage of living in the middle of the Alps — a city that combines rich cultural life with direct access to world-class hiking and skiing.
Ecaterina Sava-Huss
University Professor, PI of the group.
Research interests: random walks on infinite graphs and groups, branching random walks, aggregation models (internal and external DLA, rotor aggregation, divisible sandpiles), urn models, Abelian sandpiles.
Photo credit: Target Group/Franz Oss
Hanna Oppelmayer
Postdoctoral researcher.
Research interests: random walks on groups and their boundaries (Furstenberg–Poisson boundary), entropy of random walks, stationary ergodic measure spaces.
Webpage of Hanna.
Hanna has an FWF Esprit Fellowship since November 2025.
Nicolas Bouchot
Postdoctoral researcher.
Research interests: polymer model randomly penalized by its spatial extension, geometry of the simple random walk confined in large domains.
Martin Klötzer
PhD Student since June 2024.
Research interests: min and max displacement, speed, and asymptotic entropy for branching random walks; boundaries of random walks; stochastic abelian networks.
Julia Überbacher
PhD Student since October 2025.
Research interests: (stochastic) abelian sandpiles, sandpile Markov chains on fractals, quantum random walks.
Master thesis on Sandpile Groups at the University of Innsbruck, Austria.
Former Members
Robin Kaiser
PhD Student 04/2022-09/2025.. Currently Postdoc at TU Munich.
Yuwen Wang
Postdoctoral researcher 09/2021-03/2024. Currently Postdoc at Alfréd Rényi Institute of Mathematics, Budapest.