2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/132325We show how one can use superconductors and Josephson junctions to create a laboratory system which can explore the groundstates of the free electromagnetic field in a 3-manifold with torsion in its cohomology.17 pp. harvmac b-mode; 10 figuresHigh Energy Physics - Theorytext