Validity of Single-Atom Approximation in the Many-Atom Microlaser
Kyungwon An · Journal of the Physical Society of Japan · 2003
A criterion for the validity of the single-atom approximation in the many-atom microlaser was proposed and its adequateness has been tested in semiclassical, quantum mechanical and quantum trajectory simulations. Through these studies we conclude that the single-atom approximation, employing the same emission probability formula for individual atoms as that of the single-atom micromaser theory is valid as long as the product of the atom-field coupling constant and the atom-field interaction time is much smaller than the square root of the mean cavity photon number.