The method developed in Part I is used to obtain asymptotic expansions of the functions that represent spin operators and of the quantum expectation values near the classical limit J→∞. We calculate with accuracy to the first quantum correction the correlation functions responsible for the statistical properties of cooperative spontaneous emission (super-radiance) of a gas of twolevel molecules. It is shown that the light emitted by a finite number of molecules does not have coherence of higher orders. The statistics of the field of quantum fluctuations is discussed.
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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 79–82, December, 1975.
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Zverev, V.V. Differential equations of spin dynamics and asymptotic expansion of quantum expectation values near the classical limit. II. Soviet Physics Journal 18, 1706–1708 (1975). https://doi.org/10.1007/BF00892792
- Differential Equation
- Correlation Function
- Asymptotic Expansion
- Finite Number