2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/106923We report on the realization of a quantum degenerate atomic Fermi gas in an optical lattice. Fermi surfaces of noninteracting fermions are studied in a three-dimensional lattice. Using a Feshbach resonance, we observe a coupling of the Bloch bands in the strongly interacting regime.8 pages, 3 figures; v2: updated referencesStrongly Correlated Electronstext