Exact diagonalization of many-fermion Hamiltonian combined with wave-function readjustment II. Metallicity and electron localization in nanoscopic systems

We apply our new method of approach to electronic states in correlated syst ems [for a brief review, Part I, see: Acta Phys. Pol. B31, 2879 (2000)] to the analysis of the states and electron localization in nanoscopic chains c ontaining up to N = 12 atoms. The Mott and the Hubbard criteria of localiza tion are explicitly evaluated and the importance of the former is stressed. We also define the many-particle wave function and calculate it explicitly for the hydrogen molecule. Further applications of our method are listed a t the end.