2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/29816We study the pseudogaps in the spectra of the half-filled 2D Hubbard model using both finite-size and dynamical cluster approximation (DCA) quantum Monte Carlo calculations. A charge pseudogap, accompanied by non-Fermi liquid behavior in the self energy, is shown to persist in the thermodynamic limit. The DCA (finite-size) method systematically underestimates (overestimates) the width of the pseudogap. A spin pseudogap is not seen at half-filling.4 pages, 5 figures, revtexStrongly Correlated ElectronsSuperconductivitytext