Regensburg 2010 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 6: Poster Session I
DY 6.36: Poster
Montag, 22. März 2010, 16:00–18:00, Poster B2
Superconducting measurement of two microwave billiards with constant width shape — Stefan Bittner1, Barbara Dietz1, Maksim Miski-Oglu1, Pedro Oria Iriarte1, •Birgit Quast1, Achim Richter1,2, and Florian Schäfer1,3 — 1Institute for Nuclear Physics Darmstadt — 2ECT* Trento — 3LENS, University of Florence
Convex quantum billiards of constant width are characterized by a phase space which is separated into two parts corresponding to clockwise and anti-clockwise motion. We present experimental results for two microwave billiards of constant width shape, where each part of phase space consists of a chaotic region and a tiny region of regular motion located around the separation line in the Poincaré surface of section. Classically, the transition from clockwise to anti-clockwise motion is forbidden, whereas in the quantum system this is possible via dynamical tunneling. The aim of the microwave experiments is the investigation of spectral properties and the tunneling effects, which leads to a splitting of the degeneracies due to the clockwise/anti-clockwise symmetry. The resonance spectra obtained by superconducting measurements primarily contain dubletts. The few existing singuletts are due to the diameter orbit and their location in the resonance spectra are predictable. Therefore our attention is concentrated on the dubletts and results on their spectral properties and their splittings will be presented. The work presented in this poster was supported by the DFG within the SFB634