Much better to stick with a two-levelsystem of pass and fail, or (if you will insist on such elitism) one extra level of “pass with distinction” for the top quartile.
This paper studies the relaxation in the two—Levelsystem of the Laser superradiation interacted with radiation by the method of coherence, and gives the solution of light field about sgn.
The semiclassical laser theory proposed by Lamb for two-levelsystem is extended to the case of dye lasers. Mode coupling equations are deduced, and a discussion is given.