Czechoslovak Journal of Physics B

, Volume 18, Issue 2, pp 197–213 | Cite as

Normal and antinormal ordering of field operators in quantum optics

  • J. PeŘina
Article

Abstract

The relations between the probability distributionpn vt of the number of photonsn vt in a volumeV at timet and the probability distributions PN(W) and PA(W) of the integrated intensityW related to the normal and antinormal ordering of field operators and the relations between corresponding moments are studied for a field containingM modes. As the normally ordered correlations are measured with photodetectors and the antinormally ordered correlations are measured with quantum counters the relations betweenn vt , PN(W) and PA(W) permit the statistical behaviour of light to be determined from measurements with photodetectors and quantum counters. The results obtained here are used for the superposition of coherent and thermal fields. It is also shown that the antinormal correlations depend explicitly on the number of modes and that in the classical limit, when the average photon occupation number per mode becomes large, the distributionsn vt , PN(W) and PA(W) become equal.

Keywords

Probability Distribution Field Operator Classical Limit Statistical Behaviour Occupation Number 

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Copyright information

© Academia, Nakladatelství Československé akademie 1968

Authors and Affiliations

  • J. PeŘina
    • 1
  1. 1.Natural Science FacultyPalacký University, OlomoucOlomoucCzechoslovakia

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