Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2002-06-11
Nonlinear Sciences
Chaotic Dynamics
Scientific paper
10.1103/PhysRevE.66.016202
Recently it has been shown that time-reversal invariant systems with discrete symmetries may display in certain irreducible subspaces spectral statistics corresponding to the Gaussian unitary ensemble (GUE) rather than to the expected orthogonal one (GOE). A Kramers type degeneracy is predicted in such situations. We present results for a microwave billiard with a threefold rotational symmetry and with the option to display or break a reflection symmetry. This allows us to observe the change from GOE to GUE statistics for one subset of levels. Since it was not possible to separate the three subspectra reliably, the number variances for the superimposed spectra were studied. The experimental results are compared with a theoretical and numerical study considering the effects of level splitting and level loss.
Barth Marcus
Leyvraz Francois
Mueller Marcus
Schaefer Rudolf
Seligman Thomas H.
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