Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Rehfeld, H."'
Publikováno v:
Phys.Rev.Lett.84:867-870,2000
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 dist
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9911023
Publikováno v:
Phys. Rev. E 60, 3942 (1999)
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 can be perturbed arbitrarily. If the perturbation is increased a tran
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9907022
Publikováno v:
Phys. Rev. E 60, 2851 (1999).
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 measurement of the eigenfrequencies of a superconducting microwave resonat
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9906032
Autor:
Alt, H., Barbosa, C. I., Graef, H. -D., Guhr, T., Harney, H. L., Hofferbert, R., Rehfeld, H., Richter, A.
Publikováno v:
Phys. Rev. Lett. 81 (1998) 4847
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 analyzed as a function of the coupling strength. It is shown that the res
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9810024
Publikováno v:
Phys. Rev. E 58, 1737 (1998)
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 using a statistical measure which is given by the distribution of the norm
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9805005
Autor:
Alt, H., Dembowski, C., Graef, H. -D., Hofferbert, R., Rehfeld, H., Richter, A., Schuhmann, R., Weiland, T.
Publikováno v:
Phys. Rev. Lett. 79, 1026 (1997)
Based on very accurate measurements performed on a superconducting microwave resonator shaped like a desymmetrized three-dimensional (3D) Sinai billiard, we investigate for the first time spectral properties of the vectorial Helmholtz, i.e. non-quant
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9706025
Autor:
Alt, H., Graef, H. -D., Hofferbert, R., Rehfeld, H., Richter, A., Guhr, T., Harney, H. L., Schardt, P.
Publikováno v:
Phys. Rev. E 55, 6674 (1997)
The spectral fluctuation properties of various two- and three-dimensional superconducting billiard systems are investigated by employing the correlation-hole method. It rests on the sensitivity of the spectral Fourier transform to long range correlat
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9702007
Autor:
Rehfeld, H., Alt, H., Dembowski, C., Graef, H. -D., Hofferbert, R., Richter, A., Lengeler, H.
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" point of view. Due to the equivalence between the stationary Schroedinger
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9701010
Autor:
Alt, H., Graef, H. -D., Hofferbert, R., Rehfeld, H., Richter, A., Schardt, P., Wirzba, A., Rangacharyulu, C.
Publikováno v:
Phys. Rev. E 54, 2303 (1996)
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 the measured spectrum in terms of several methods originally derived fo
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9605004
Publikováno v:
Phys. Rev. E 53, 2217 (1996)
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 algebraic tail. The weight of the algebraic decay tends to zero for vanishing
Externí odkaz:
http://arxiv.org/abs/chao-dyn/9506012