Autor: Stöckmann, H. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Scattering Properties of Chaotic Microwave Billiards
Autorzy:: Stöckmann, H.
Powiązania:: https://bibliotekanauki.pl/articles/1585125.pdf
Data publikacji:: 2009-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 03.65.Nk
05.45.Mt
Opis:: Reflection and transmission measurements in microwave billiards with attached antennas allow the determination of all components of the scattering matrix including their phases. This is an extraordinary situation, since in usual scattering experiments in nuclear or atomic physics only reduced information such as the scattering cross-section can be obtained where the phase information is completely lost. This allows experimental tests of theoretical predictions of scattering theory inaccessible by any other method. As an example the distribution of reflection coefficients and of the line widths in a chaotic microwave billiard are discussed.
Źródło:: Acta Physica Polonica A; 2009, 116, 5; 783-789
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Fidelity in Quasi-1D Systems as a Probe for Anderson Localization
Autorzy:: Bodyfelt, J.
Zheng, M.
Kottos, T.
Kuhl, U.
Stöckmann, H.
Powiązania:: https://bibliotekanauki.pl/articles/1585120.pdf
Data publikacji:: 2009-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 42.25.Dd
72.15.Rn
03.65.Nk
03.65.Yz
Opis:: We analyze the echo dynamics in quasi-one-dimensional random media to investigate how the transition from localization to delocalization is encoded in its temporal decay properties. Our analysis extends from the standard perturbative regime corresponding to small perturbations (with respect to the mean level spacing) in the echo dynamics, out to the Wigner decay regime. On the theoretical side, our results rely on a banded random matrix modeling, and show in the localized regime under small perturbations a novel decay of the fidelity (Loschmidt echo), differing from the typical Gaussian decay seen within both diffusive and chaotic systems. For larger perturbation strengths, typical Wigner exponential decays are observed. Scattering echo measurements are performed experimentally within a quasi-1D microwave cavity randomly populated with point-like scatterers. Agreements are observed between experiments, numerics, and theoretical predictions.
Źródło:: Acta Physica Polonica A; 2009, 116, 5; 756-764
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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