2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/207590We study the response of the QCD vacuum to strong magnetic fields, using a potential model for the quark-antiquark interaction. We find that production of spin-polarized u-ubar pairs is energetically favorable for fields B > B_crit \sim 10 GeV^2. We contrast the resulting u-ubar condensate with the quark condensate which is present at zero magnetic field, and we estimate the corresponding magnetization as a function of B.16 pages, LaTeX, 3 eps figures. v2: references added. v3: fixed typoHigh Energy Physics - PhenomenologyHigh Energy Physics - Theorytext