The two-level correlation function and the form-factor

Abstract

The disordered quantum systems are considered in the one-electron approximation. The discrete spectrum is calculated using the Anderson model for orthogonal and unitary symmetry. The electron spectral fluctuations are studied in terms of the two-level correlation function and the form-factor. The universality at the metal-insulator transition is demonstrated. It is shown that asymptotic of the two-level correlations at large energies vanish faster as expected.