2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40458A Coulomb gas representation of dense-matter QCD is derived from a dual transformation of the low-energy effective Lagrangian. The point-like charges Q=+1,-1 of the gas are identified with the instantons and anti-instantons of such topological charges. An instanton repels another instanton with the same force as it attracts an anti-instanton, in contrast to the semiclassical interaction.8 pages, Revtex (a typo fixed)High Energy Physics - PhenomenologyHigh Energy Physics - LatticeHigh Energy Physics - TheoryNuclear Theorytext