2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/204126Closed string field theory is constructed by stochastically quantizing a matrix model for Polyakov loops that describes phases of a large N gauge theory at finite temperature. Coherent states in this string field theory describes winding string condensation which has been expected to cause a topology change from thermal AdS geometry to AdS-Schwarzschild black hole geometry. D-branes in this closed string field theory is also discussed. Slightly extended version of a talk given at CosPA 2007, Nov.13-15, Taipei, Taiwan.Slightly extended version of a talk given at CosPA 2007, Nov.13-15, Taipei, Taiwan; 14 pagesHigh Energy Physics - Theorytext