2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/17830Exact ground-state properties are presented by combining the diagonalization in the Fock space (and taking all hopping integrals and all two-site interactions) with the ab initio optimization of the Wannier functions. Electrons are essentially localized for the interatomic distance R~2A for s-like states, when the quasiparticle mass is divergent. The momentum distribution dispersion is proposed to define the localization order parameter. Dimerization and zero-point energies are also discussed. The method provides convergent results for N>=8 atoms.4 pages; submitted to Phys. Rev. LettStrongly Correlated Electronstext