Induced Violation of Time-Reversal Invariance in the Regime of Weakly Overlapping Resonances

B. Dietz, T. Friedrich, H. L. Harney, M. Miski-Oglu, A. Richter, F. Schäfer, J. Verbaarschot, H. A. Weidenmüller
2009 Physical Review Letters  
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, fit some of the properties of the scattering amplitudes, and then successfully predict others. Our work constitutes the most precise test of the theoretical approach to T-violation within the framework of random-matrix theory so far available.
doi:10.1103/physrevlett.103.064101 pmid:19792569 fatcat:4qygojgqbrhj3pgvnqgoqm2fey