The Stationary Phase Method for a Wave Packet in a Semiconductor Layered System. The applicability of the method

H. Rodríguez-Coppola, L. Diago-Cisneros, R. Pérez-Álvarez

Using the formal analysis made by Bohm in his book, {\em "Quantum theory"}, Dover Publications Inc. New York (1979), to calculate approximately the phase time for a transmitted and…