2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/96784We show that the topological gauge structure in the phase string theory of the {\rm t-J} model gives rise to a global phase diagram of antiferromagnetic (AF) and superconducting (SC) phases in a weakly doped regime. Dual confinement and deconfinement of holons and spinons play essential roles here, with a quantum critical point at a doping concentration $x_c\simeq 0.043$. The complex experimental phase diagram at low doping is well described within such a framework.4 pages, 2 figures, modified version, to appear in Phys. Rev. LettStrongly Correlated ElectronsSuperconductivityHigh Energy Physics - Theorytext