2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/57597We develop the analytic perturbation technique on the absolutely continuous spectrum and calculate the Scattering matrix for the Schrödinger operator on the Quantum Network based on the Dirichlet-to Neumann map of an Intermediate operator.49 pages, revtexMathematical PhysicsSpectral Theory47F05, 47A40,47A55text