We derive two quantum-mechanical photocount formulas when a light field’s density operator ρ is known; one involves ρ’s coherent state mean value and the other involves ρ’s Wigner function; when this information is known, then using these two formulas to calculate the photocount would be convenient. We employ the technique of integration within an antinormally ordered (or Weyl-ordered) product of operators in our derivation.
© 2008 Optical Society of America
Original Manuscript: August 8, 2007
Revised Manuscript: November 15, 2007
Manuscript Accepted: January 4, 2008
Published: February 21, 2008
Hong-yi Fan and Li-yun Hu, "Two quantum-mechanical photocount formulas," Opt. Lett. 33, 443-445 (2008)