2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/39207The vortex state which arises from a projection of SU(2) to $Z_2$ gauge theory is studied at finite temperatures with a special emphasis on the deconfinement phase transition.6 pages, 4 PS figures, LaTeX using PSFIG, talk presented at the workshop ''Understanding confinement'', ECT* Trento, March 1 - 13, 1999High Energy Physics - Latticetext