2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/126708We show that the critical behavior of a colloid-polymer mixture inside a random porous matrix of quenched hard spheres belongs to the universality class of the random-field Ising model. We also demonstrate that random-field effects in colloid-polymer mixtures are surprisingly strong. This makes these systems attractive candidates to study random-field behavior experimentally.4 pages, 3 figures, to appear in Phys. Rev. LettSoft Condensed Mattertext