Sub-poissonian statistics of fluorescence from a single atom driven by a continuous wave laser field

Statistics of fluorescence photons emitted by a single two-level atom interacting with a continuous wave laser field are analyzed. The photon-counting distribution is calculated for the so-called intermediate fluorescence photons, i.e., those counted during the time interval between instants at whic...

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Bibliographic Details
Published in:Journal of experimental and theoretical physics 2005-07, Vol.101 (1), p.64-72
Main Author: Osad’ko, I. S.
Format: Article
Language:English
Subjects:
ATOMS
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
DISTRIBUTION
FLUORESCENCE
LASER RADIATION
PHOTON-ATOM COLLISIONS
PHOTONS
STATISTICS
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Summary:Statistics of fluorescence photons emitted by a single two-level atom interacting with a continuous wave laser field are analyzed. The photon-counting distribution is calculated for the so-called intermediate fluorescence photons, i.e., those counted during the time interval between instants at which photons are emitted. The result is a sub-Poissonian (narrower than Poisson) distribution, which agrees with experimental observations. This intermediate-photon distribution is used to calculate the average number of fluorescence photons, the second factorial moment of the photon-counting distribution, and Mandel's Q parameter commonly used to evaluate the deviation of photon statistics from the Poisson distribution. The theoretical expressions obtained for moments of the intermediate-photon distribution are different from well-known Mandel's formulas.
ISSN:1063-7761
1090-6509
DOI:10.1134/1.2010662