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DY: Fachverband Dynamik und Statistische Physik

DY 23: Quantum Chaos

DY 23.2: Vortrag

Mittwoch, 2. April 2014, 15:15–15:30, ZEU 146

Experimental realization of superconducting quantum graphs — Barbara Dietz-Pilatus, Maksym Miski-Oglu, •Tetyana Skipa, and Achim Richter — Technische Universität Darmstadt, Institut für Kernphysik, Schlossgartenstraße 9, 64289 Darmstadt

We report on the design of superconducting quantum graphs, which will be realized with networks of two-dimensional microwave waveguides. We compare numerical results for the eigenvalue spectrum of microwave networks with that of the corresponding quantum graphs. Furthermore, the complete scattering matrix (S-matrix) of the microwave network was calculated and its properties are compared with theoretical predictions for the occurrence of topological resonances in open quantum graphs [1] and higher order correlation functions of the S-matrix [2]. The numerical calculations were performed with CST MW Studio. The scattering matrix is planned to be measured experimentally with superconducting microwave networks at liquid helium temperature in the frequency range from 14 to 40 GHz. This work was supported by the DFG within the Sonderforschungsbereich 634.

[1] S. Gnutzmann, H. Schanz and U. Smilansky, Phys. Rev. Lett. 110, 094101 (2013) [2] Z. Pluhar, H. A. Weidenmueller, Phys. Rev. Lett. 110, 034101 (2013)