2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/89847We consider a symmetric double barrier heterostructure enclosing a well and propose a solution for the transmission problem using a generalized WKB approach which accounts for the amplitude suppression and phase shift due to the barriers. This approach allows us to address both off-resonance and resonance cases and, in the latter case, verify the coherent destruction of tunneling.17 pages, 2 figures and 1 tableQuantum Physicstext