Subcoherent p-representation for non-classical photon states
Constantin Brif, Y. Ben-Aryeh · Quantum Optics Journal of the European Optical Society Part B · 1994
The Barut-Girardello states (the eigenstates of the SU(1, 1) lowering generator K - are considered in the harmonic oscillator Hilbert space. They are found to have sub-Poissonian photon statistics. By using these states, the diagonal P-representation of the density operator is constructed, and it is shown to be well behaved for non-classical photon states.