Chinese Journal of Lasers, Volume. 14, Issue 10, 594(1987)
Quantum beats in superradiance
A quantum theory for collective spontaneous emission of a multiatomic system with different resonance frequencies is, applied here to the superradiant emission of two groups of atoms undergoing two independent transitions. An analytical expression for the emmited intensity as a function of time is obtained after making rotating wave approximation, slowly varying envelope approximation and decorrelation approximation.
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Gu Qiao. Quantum beats in superradiance[J]. Chinese Journal of Lasers, 1987, 14(10): 594