Distribution of Fano parameters in a mesoscopic system with broken time-reversal symmetry

Uski, V.; Mota-Furtado, F. and O'Mahony, P. F. (2007). Distribution of Fano parameters in a mesoscopic system with broken time-reversal symmetry. Journal of Physics A: Mathematical and Theoretical, 40(22) pp. 5857–5864.

DOI: https://doi.org/10.1088/1751-8113/40/22/006

Abstract

We report on numerical calculations of the distribution of complex Fano parameters in a mesoscopic system consisting of a waveguide attached to a disordered cavity. An external magnetic field in the cavity breaks the time-reversal symmetry. The real and imaginary parts of the parameters as well as the widths are obtained by fitting the Beutler-Fano form to the calculated resonance data. The distributions are compared with the predictions from random matrix theory which have been modified to exclude resonances below a certain cut-off width.

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