Mark Kac Seminar
Location:
11:1513:00 
speaker: Evgeny Verbitskiy (Philips Research / RU Groningen) 
title: Abelian Sandpiles and the Harmonic Model 
We present a
construction of an entropypreserving equivariant surjective map from the
ddimensional critical sandpile model to a certain compact abelian group (the
`harmonic model'). A similar map is constructed for the dissipative abelian
sandpile model and is used to prove uniqueness and the Bernoulli property of
the measure of maximal entropy for that model.


14:1516:00 
speaker:
Wojciech De Roeck (ETH
Zürich) 
title: Diffusion in quantum systemreservoir models 
We treat the following
question: Consider a quantum particle on a lattice coupled to a thermal
reservoir consisting of free bosons. Common wisdom suggests that, if the
temperature of the reservoir is strictly positive, the particle diffuses. Up
to now, we can prove this in two cases (both assuming that the coupling
between particle and reservoir is weak): 
Mark Kac Seminar 20082009 

last updated: 19 nov 2008by Markus 