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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Bibliographic Details
Published in:	Physical review letters Vol. 103; no. 6; p. 064101
Main Authors:	Dietz, B, Friedrich, T, Harney, H L, Miski-Oglu, M, Richter, A, Schäfer, F, Verbaarschot, J, Weidenmüller, H A
Format:	Journal Article
Language:	English
Published:	United States 07-08-2009
Subjects:	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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Summary:	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.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.103.064101