2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/89452The stimulated emission from an atom interacting with radiation in non-equilibrium state is considered. The stochastic limit, applied to the non-relativistic Hamiltonian describing the interaction, shows that the state of atoms, driven by some non-equilibrium state of the field approaches a stationary state which can continuously emit photon, unlike the case with an equilibrium state.6 pages, 2 figuresQuantum Physicstext