Darmstadt 2008 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 8: Kernphysik / Spektroskopie
HK 8.6: Vortrag
Montag, 10. März 2008, 15:15–15:30, 2G
Dorway state phenomena in nuclei simulated through microwave billiards — Sven Åberg1, Thomas Guhr2, •Maksim Miski-Oglu3, and Achim Richter3 — 1Matematisk Fysik, LTH, Lunds Universitet, Lund, Sweden — 2Fachbereich Physik, Universität Duisburg–Essen, Duisburg, Germany — 3Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
In a unifying way, the doorway mechanism explains spectral properties in a rich variety of open mesoscopic quantum systems, ranging from atoms to nuclei. A distinct state and a background of other states couple to each other which sensitively affects the strength function. The recently measured superscars in the barrier billiard provide an ideal model for an in–depth investigation of this mechanism. We introduce two new statistical observables for its study, the maximum coupling coefficient to the doorway and directed spatial correlators. Using Random Matrix Theory and random plane waves, we obtain a consistent understanding of the experimental data.