2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/34536Using the first-order approximating solutions to the Einstein-Maxwell-Klein-Gordon system of equations for a complex scalar field minimally coupled to a spherically symmetric spacetime, we study the feedback of gravity and electric field on the charged scalar source. Within a perturbative approach, we compute, in the radiation zone, the transition amplitudes and the coherent source-field regeneration rate.10 pages LaTex, no figuresGeneral Relativity and Quantum Cosmologytext