Collisional Transitory Enhancement of the High Momentum Components of a Quantum Wave Packet
S. Brouard, Juan Gonzalo Muga · Physical Review Letters · 1998
A classically forbidden, transitory enhancement of the high positive momentum components of a quantum wave packet during its collision with a potential barrier is described. A quantity is defined to measure its importance; the universality of the effect is justified, and its main features are studied with the aid of an analytically solvable model. Its relation to other ``anomalously high velocities'' is also examined.