2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/95470We present a Monte Carlo method to simulate asymmetric binary mixtures in the grand canonical ensemble. The method is used to study the colloid-polymer model of Asakura and Oosawa. We determine the phase diagram of the fluid-fluid unmixing transition and the interfacial tension, both at high polymer density and close to the critical point. We also present density profiles in the two-phase region. The results are compared to predictions of a recent density functional theory.4 pages, 4 figuresSoft Condensed MatterMaterials Sciencetext