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Matrix models and eigenvalue statistics for truncations of classical ensembles of random unitary matrices
Rowan Killip, Rostyslav Kozhan
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We consider random non-normal matrices constructed by removing one row and column from samples from Dyson's circular ensembles or samples from the classical compact groups. We develop sparse matrix models whose spectral measures match these ensembles. This allows us to compute the joint law of the eigenvalues, which have a natural interpretation as resonances for open quantum systems or as electrostatic charges located in a dielectric medium. Our methods allow us to consider all values of β>0, not merely β=1,2,4.
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