97-442 King C., Waxler R.

Stimulated particle emission -- a simple example. (67K, Plain TEX) Aug 11, 97

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Abstract. We find evidence of stimulated photon emission in a simple model of the atom plus radiation system, namely a two state atom interacting with a quantised scalar field in the rotating wave approximation. We use an initial state where the atom is excited and there is one photon present, and the photon energy is close to the energy difference between the two atomic states. By taking the long-time, weak-coupling limit, we compute in closed form the probability that the atom remains in its excited state as a function of the rescaled time. Our results indicate that stimulated emission does occur for certain initial photon states, but only at quadratic order in the rescaled time. We also find partial recurrence of the excited state.

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