title: Two quantum-mechanical photocount formulas.
abstract: We derive two quantum-mechanical photocount formulas when a light field's density operator rho is known; one involves rho's coherent state mean value and the other involves rho'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.
authors.affiliation: Department of Physics, Shanghai Jiao Tong University, Shanghai, China.
authors.forename: Hong-Yi
authors.initials: HY
authors.lastname: Fan
authors.forename: Li-Yun
authors.initials: LY
authors.lastname: Hu