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Dresden 2003 – scientific programme

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DY: Dynamik und Statistische Physik

DY 46: Poster

DY 46.35: Poster

Thursday, March 27, 2003, 15:30–18:00, P1

Correlation functions of scattering matrix elements in microwave cavities with strong absorption — •R. Schäfer1, T. Gorin2, T. H. Seligman3, and H.-J. Stöckmann11AG Quantenchaos, Fachbereich Physik, Philipps-Universität Marburg — 2Theoretische Quantendynamik, Fakultät für Physik, Universität Freiburg — 3Centro de Ciencias Físicas, UNAM, Cuernavaca, México

The scattering matrix was measured for microwave cavities with two antennas. It was analyzed in the regime of overlapping resonances. The theoretical description in terms of a statistical scattering matrix and the rescaled Breit-Wigner approximation has been applied to this regime. The experimental results for the auto-correlation function show that the absorption in the cavity walls yields an exponential decay. This behavior can only be modeled using a large number of weakly coupled channels. In comparison to the auto-correlation functions, the cross-correlation functions of the diagonal S-matrix elements display a more pronounced difference between regular and chaotic systems.

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