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Parametric S-matrix fluctuations in quantum theory of chaotic scattering

A. M. S. Macedo
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Abstract

We study the effects of an arbitrary external perturbation in the statistical properties of the S-matrix of quantum chaotic scattering systems in the limit of isolated resonances. We derive, using supersymmetry, an exact non-perturbative expression for the parameter dependent autocorrelator of two S-matrix elements. Universality is obtained by appropriate rescaling of the physical parameters. We propose this universal function as a new signature of quantum chaos in open systems.

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A. M. S. Macedo. 1994-04-14. Parametric S-matrix fluctuations in quantum theory of chaotic scattering. https://doi.org/10.1103/physreve.50.r659

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