Publications (13)
Anderson Localization in a String of Microwave Cavities
C. Dembowski, H. -D. Graef, R. Hofferbert +3
The field distributions and eigenfrequencies of a microwave resonator which is composed of 20 identical cells have been measured. With external screws the periodicity of the cavity…
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…
Correlation-Hole Method for Spectra of Superconducting Microwave Billiards
H. Alt, H. -D. Graef, R. Hofferbert +5
The spectral fluctuation properties of various two- and three-dimensional superconducting billiard systems are investigated by employing the correlation-hole method. It rests on th…
An overview of the mid-infrared spectro-interferometer MATISSE: science, concept, and current status
A. Matter, B. Lopez, P. Antonelli +104
MATISSE is the second-generation mid-infrared spectrograph and imager for the Very Large Telescope Interferometer (VLTI) at Paranal. This new interferometric instrument will allow…
Wave Dynamical Chaos in Superconducting Microwave Cavities
H. Rehfeld, H. Alt, C. Dembowski +4
During the last few years we have studied the chaotic behavior of special Euclidian geometries, so-called billiards, from the quantum or in more general sense "wave dynamical" poin…
Experimental vs. Numerical Eigenvalues of a Bunimovich Stadium Billiard -- A Comparison
H. Alt, C. Dembowski, H. -D. Graef +4
We compare the statistical properties of eigenvalue sequences for a gamma=1 Bunimovich stadium billiard. The eigenvalues have been obtained by two ways: one set results from a meas…
The MICADO first light imager for the ELT: overview and current Status
E. Sturm, R. Davies, J. Alves +151
MICADO is a first light instrument for the Extremely Large Telescope (ELT), set to start operating later this decade. It will provide diffraction limited imaging, astrometry, high…
Wave Dynamical Chaos in a Superconducting Three-Dimensional Sinai Billiard
H. Alt, C. Dembowski, H. -D. Graef +5
Based on very accurate measurements performed on a superconducting microwave resonator shaped like a desymmetrized three-dimensional (3D) Sinai billiard, we investigate for the fir…
Studies of chaotic Dynamics in a Three-Dimensional Superconducting Microwave Billiard
H. Alt, H. -D. Graef, R. Hofferbert +5
We present first measurements on a superconducting three-dimensional, partly chaotic microwave billiard shaped like a small deformed cup. We analyze the statistical properties of t…
Mode Fluctuation Distribution for Spectra of Superconducting Microwave Billiards
H. Alt, C. Dembowski, H. -D. Graef +4
High resolution eigenvalue spectra of several two- and three-dimensional superconducting microwave cavities have been measured in the frequency range below 20 GHz and analyzed usin…
Decay of Classical Chaotic Systems - the Case of the Bunimovich Stadium
H. Alt, H. -D. Graef, R. Hofferbert +4
The escape of an ensemble of particles from the Bunimovich stadium via a small hole has been studied numerically. The decay probability starts out exponentially but has an algebrai…
MICADO: first light imager for the E-ELT
R. Davies, J. Schubert, M. Hartl +80
MICADO will equip the E-ELT with a first light capability for diffraction limited imaging at near-infrared wavelengths. The instrument's observing modes focus on various flavours o…
Coupled Microwave Billiards as a Model for Symmetry Breaking
H. Alt, C. I. Barbosa, H. -D. Graef +5
Two superconducting microwave billiards have been electromagnetically coupled in a variable way. The spectrum of the entire system has been measured and the spectral statistics ana…