Correlation functions of scattering matrix elements in microwave cavities with strong absorption

Details Correlation functions of scattering matrix elements in microwave cavities with strong absorption Correlation functions of scattering matrix elements in microwave cavities with strong absorption

2002-12-09

arxiv.org/abs/nlin/0212021v1

Nonlinear Sciences

Chaotic Dynamics

Scientific paper

10.1088/0305-4470/36/12/325

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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