Statistical relaxation in closed quantum systems and the Van Hove-limit
Universtität Osnabrück, Fachbereich Physik, Barbarastrasse 7, 49069 Osnabrück, Germany
2 Universität Stuttgart I, Institut für Theoretische Physik, Pfaffenwaldring 57/IV, 70550 Stuttgart, Germany
We analyze the dynamics of occupation probabilities for a certain type of design models by the use of two different methods. On the one hand we present some numerical calculations for two concrete interactions which point out that the occurrence of statistical dynamics depends on the interaction structure. Furthermore we show an analytical derivation for an infinite system that yields statistical behaviour for the average over the whole ensemble of interactions in the Van Hove-limit.
© EDP Sciences, Springer-Verlag, 2007