Regensburg 2004 – wissenschaftliches Programm

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DY: Dynamik und Statistische Physik

DY 27: Quantum Chaos

DY 27.4: Vortrag

Dienstag, 9. März 2004, 17:15–17:30, H3

Semiclassical approximations for open systems: transport and decay — •Mathias Puhlmann, Holger Schanz, Tsampikos Kottos, and Theo Geisel — Max-Planck Institut für Strömungsforschung und Institut für Nichtlineare Dynamik der Universität Göttingen, Bunsenstr. 10, 37073 Göttingen

Important and diverse physical applications like electronic transport through mesoscopic devices or microcrystal lasers require an understanding of open quantum systems with chaotic classical limit. For many interesting processes in such systems the interference between classical trajectories is decisive. Therefore the standard semiclassical theory based on the diagonal approximation is not accurate or fails at all. Using quantum graphs as model systems we show how one can improve the semiclassical description such that shot noise and the short-time devitions from a simple exponential probability decay are reproduced.

H. Schanz, M. Puhlmann and T. Geisel, Phys. Rev. Lett. 91(03)134101.