Manipulation of the population of hyperfine sublevels by pulsed resonance electromagnetic fields

A method has been proposed for rapidly and deeply changing the population in the system of unequally populated hyperfine atomic levels, including the ground-state sublevels, due to the impact of mutually coherent pulsed resonance electromagnetic fields. The method can be implemented, e.g., to create new schemes of the amplification or effective absorption of the radiation passing through a medium, to develop the new field of quantum electronics, spintronics, involving the current of polarized electrons, and to create new schemes of quantum computers.