First Experimental Evidence for Chaos-Assisted Tunneling in a Microwave Annular Billiard

Details First Experimental Evidence for Chaos-Assisted Tunneling in a Microwave Annular Billiard First Experimental Evidence for Chaos-Assisted Tunneling in a Microwave Annular Billiard

1999-11-17

arxiv.org/abs/chao-dyn/9911023v2

Phys.Rev.Lett.84:867-870,2000

Nonlinear Sciences

Chaotic Dynamics

5 pages RevTex, 5 low-resolution figures (high-resolution figures: http://linac.ikp.physik.tu-darmstadt.de/heiko/chaospub.html

Scientific paper

10.1103/PhysRevLett.84.867

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 so-called quasi-doublet 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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