2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198405We study, by numerical simulations on a lattice, the behaviour of the gauge-invariant quark-antiquark nonlocal condensates in the QCD vacuum with dynamical fermions. A determination is also done in the quenched approximation and the results are compared with the full-QCD case. The fermionic correlation length is extracted and compared with the analogous gluonic quantity.14 pages, LaTeX file, + 6 PS figuresHigh Energy Physics - Latticetext