Abstract
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.
- Received 11 March 1993
DOI:https://doi.org/10.1103/PhysRevLett.70.4126
©1993 American Physical Society