2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/137583We construct a Hamiltonian that singles out the chiral spin liquid on a square lattice with periodic boundary conditions as the exact and, apart from the two-fold topological degeneracy, unique ground state.5 pages, no figuresStrongly Correlated ElectronsMesoscale and Nanoscale Physicstext