Cooperative effects in radiation processes (multilevel particles and second-order perturbation theory)
- 1 January 1974
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 9 (1) , 538-549
- https://doi.org/10.1103/physreva.9.538
Abstract
The Dicke theory of coherent spontaneous emission is generalized by means of group-theoretical methods. Effects of superradiation and the structure of coherent responses of an equilibrium medium to pulsed excitation are considered. A method of calculating cooperative effects in second-order perturbation theory is developed. The role of collective properties of a system of radiators in experiments with high power exciting radiation is discussed. Some "anomalous" features of stimulated Raman scattering are accounted for.Keywords
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