2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54293A physical system composed by a scalar field minimally coupled to gravity and a thermal reservoir, as in thermo field dynamics, all of them in curved space time, is considered. When the formalism of thermo field dynamics is generalized to the above mentioned case, an amplification in the number of created particles is predicted.7 pages; Plain TexHigh Energy Physics - Theorytext