2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/148664We use a complete pseudoparticle operator representation to study the explicit form of the finite-frequency conductivity for the Hubbard chain. Our study reveals that the spectral weight is mostly concentrated at the ω=0 Drude peak (except at density n=1) and at an absorption starting just below twice the value of the chemical potential whose ω-dependence we evaluate exactly. We also obtain the exact ωdependence of the higher-energy, less-pronounced absorption edges, whose weights vanish for large on-site interaction U.LaTeX file, no figures, 11 pagesCondensed Mattertext