Phys. Rev. Lett. 70, 4126–4129 (1993)Brownian-motion model for parametric correlations in the spectra of disordered metalsReceived 11 March 1993; published in the issue dated 28 June 1993 We study the response to an external perturbation of the energy levels of a disordered metallic particle, by means of the Brownian-motion model introduced by Dyson in the theory of random matrices, and reproduce the results of a recent microscopic [A. Szafer and B. L. Altshuler, Phys. Rev. Lett. 70, 587 (1993)]. This establishes the validity of Dyson’s basic assumption, that parametric correlations in the energy spectrum are dominated by ‘‘level repulsion,’’ and therefore soley dependent on the symmetry of the Hamiltonian. © 1993 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.70.4126
DOI:
10.1103/PhysRevLett.70.4126
PACS:
73.20.Dx, 05.40.+j, 05.45.+b, 71.25.-s
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