Regensburg 2007 – wissenschaftliches Programm

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DY: Fachverband Dynamik und Statistische Physik

DY 24: Poster I

DY 24.14: Poster

Mittwoch, 28. März 2007, 16:00–18:00, Poster D

Mushroom billiards — Stefan Bittner, Barbara Dietz-Pilatus, •Thomas Friedrich, Maksim Miski-Oglu, Pedro Oria-Iriarte, Achim Richter, and Florian Schäfer — Institut für Kernphysik, Schloßgartenstraße 9, 64289 Darmstadt

Mushroom billiards are mixed systems providing a clearly separated phase space. Using a superconducting microwave billiard the spectral properties of quantum mushroom billiards are investigated. Particularly a supershell modulation in the level density and a substructure in the nearest neighbor spacing distribution of levels are found. By decomposing the spectrum in a regular and chaotic part the influence of dynamic tunneling on the eigenfrequencies is reveiled. Wave functions of mushroom billiards have also been determined at room temperature. They are related to the classical dynamics of the billiard. Finally, the decay behavior of classical and quantum mushroom billiards is considered.