266 citations · 929 across the 11 of their papers we have counts for
11 papers
First experimental evidence for quantum echoes in scattering systems
C. Dembowski, B. Dietz, T. Friedrich +6
A self-pulsing effect termed quantum echoes has been observed in experiments with an open superconducting and a normal conducting microwave billiard whose geometry provides soft ch…
Encircling an Exceptional Point
C. Dembowski, B. Dietz, H. -D. Graef +4
We calculate analytically the geometric phases that the eigenvectors of a parametric dissipative two-state system described by a complex symmetric Hamiltonian pick up when an excep…
Observation of a Chiral State in a Microwave Cavity
C. Dembowski, B. Dietz, H. -D. Graef +4
A microwave experiment has been realized to measure the phase difference of the oscillating electric field at two points inside the cavity. The technique has been applied to a diss…
Phase shift experiments identifying Kramers doublets in a chaotic superconducting microwave billiard of threefold symmetry
C. Dembowski, B. Dietz, H. -D. Graef +5
The spectral properties of a two-dimensional microwave billiard showing threefold symmetry have been studied with a new experimental technique. This method is based on the behavior…
Experimental Test of a Trace Formula for a Chaotic Three Dimensional Microwave Cavity
C. Dembowski, B. Dietz, H. -D. Graef +4
We have measured resonance spectra in a superconducting microwave cavity with the shape of a three-dimensional generalized Bunimovich stadium billiard and analyzed their spectral f…
First Experimental Evidence for Chaos-Assisted Tunneling in a Microwave Annular Billiard
C. Dembowski, H. -D. Graef, A. Heine +3
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…