Experimental Observation of the Spectral Gap in Microwave n-Disk Systems

Abstract

Symmetry reduced three-disk and five-disk systems are studied in a microwave setup. Using harmonic inversion the distribution of the imaginary parts of the resonances is determined. With increasing opening of the systems, a spectral gap is observed for thick as well as for thin repellers and for the latter case it is compared with the known topological pressure bounds. The maxima of the distributions are found to coincide for a large range of the distance to radius parameter with half of the classical escape rate. This confirms theoretical predictions based on rigorous mathematical analysis for the spectral gap and on numerical experiments for the maxima of the distributions.

5 pages, 4 figures

References in corpus (4)

• Fractal Weyl laws for chaotic open systems
• Weyl asymptotics: From closed to open systems
• Lifetime statistics in chaotic dielectric microresonators
• Fractal Weyl laws for asymptotically hyperbolic manifolds

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