Induced violation of time-reversal invariance in the regime of weakly overlapping resonances

Induced violation of time-reversal invariance in the regime of weakly overlapping resonances

We measure the complex scattering amplitudes of a flat microwave cavity (a "chaotic billiard"). Time-reversal (T) invariance is partially broken by a magnetized ferrite placed within the cavity. We extend the random-matrix approach to T violation in scattering, determine the parameters fro...

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Veröffentlicht in:Physical review letters 2009-08, Vol.103 (6), p.064101-064101, Article 064101
Hauptverfasser: Dietz, B, Friedrich, T, Harney, H L, Miski-Oglu, M, Richter, A, Schäfer, F, Verbaarschot, J, Weidenmüller, H A
Format: Artikel
Sprache:eng
Schlagworte:
AMPLITUDES
CHAOS THEORY
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
FERRIMAGNETIC MATERIALS
FERRITES
INVARIANCE PRINCIPLES
IRON COMPOUNDS
MAGNETIC MATERIALS
MATERIALS
MATHEMATICS
MATRICES
OXYGEN COMPOUNDS
RANDOMNESS
SCATTERING AMPLITUDES
T INVARIANCE
TRANSITION ELEMENT COMPOUNDS
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Beschreibung
Zusammenfassung:We measure the complex scattering amplitudes of a flat microwave cavity (a "chaotic billiard"). Time-reversal (T) invariance is partially broken by a magnetized ferrite placed within the cavity. We extend the random-matrix approach to T violation in scattering, determine the parameters from some properties of the scattering amplitudes, and successfully predict others. Our work constitutes the most precise test of the random-matrix theoretical approach to T violation so far available.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.103.064101