Berlin 2012 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 29: Posters II

DY 29.10: Poster

Donnerstag, 29. März 2012, 17:00–19:00, Poster A

The Van Vleck propagator for bosonic fields — •Thomas Engl, Juan-Diego Urbina, and Klaus Richter — Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg

In single particle physics semiclassics provides a very powerful toolbox consisting of e.g. the Van Vleck propagator and Gutzwiller’s Green function which are calculated from the properties of the real classical trajectories only.

We have derived an analogue of the Van Vleck propagator for bosonic quantum fields based on the usage of quadratures. We sketch the derivation of the propagator and present some applications to the Bose-Hubbard model as well.