2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/228121We consider the evolution of a tight binding wave packet propagating in a time dependent potential. If the potential evolves according to a stationary Markov process, we show that the square amplitude of the wave packet converges, after diffusive rescaling, to a solution of a heat equation.19 pages, acknowledgments added and typos correctedMathematical Physicstext