2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/219164We show that the collapse of the entangled quantum state makes the entropy increase in an isolated system. The second law of thermodynamics is thus proven in its most general form.6 pagesQuantum PhysicsCollapse of the Entangled State and the Entropy Increase in an Isolated Systemtext