First experimental evidence for chaos-assisted tunneling in a microwave annular billiard |
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Authors: | Dembowski Graf Heine Hofferbert Rehfeld Richter |
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Affiliation: | Institut fur Kernphysik, Technische Universitat Darmstadt, D-64289 Darmstadt, Germany. |
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Abstract: | We report on first experimental signatures for chaos-assisted tunneling in a two-dimensional annular billiard. Measurements of microwave spectra from a superconducting cavity with high frequency resolution are combined with electromagnetic field distributions experimentally determined from a normal conducting twin cavity with high spatial resolution to resolve eigenmodes with properly identified quantum numbers. Distributions of quasidoublet splittings serve as basic observables for the tunneling between whispering gallery-type modes localized to congruent, but distinct tori which are coupled weakly to irregular eigenstates associated with the chaotic region in phase space. |
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