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Universität Augsburg
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Universität Augsburg
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Professor Dr. Stein Andreas Bethuelsen
University of Bergen
spricht am
Mittwoch, 3. Juli 2024
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16:00 Uhr
im
Raum 2004 (L1)
über das Thema:
| Abstract: |
| Assign to each lattice point of $Z^d$ a Poissonian number of particles and let each of them evolve independently as discrete-time simple random walks. On top of this dynamically evolving environment we consider an additional random walk whose jump transition depends on whether there are particles present at its location or not. This is the so-called random walk on random walks model. Previous studies have concluded that this model on $Z^d$, $d\geq1$, has a diffusive scaling when the density of particles is sufficiently low or sufficiently high. We will argue that this holds for all densities for the model on $Z^d$ when $d\geq5$. Our proof of this rely on a novel domination result for the dynamic environment that, when combined with coupling arguments and standard random walk estimates, yield uniform mixing bounds for the so-called local environment process. Based on joint work, partly in progress, with Florian Völlering (University of Leipzig). |
| Hierzu ergeht herzliche Einladung. |
| Prof. Dr. Markus Heydenreich |