Abstract
The statistical properties of the time evolution operator for the Hamiltonian describing the simultaneous non-degenerate parametric amplifier, and mixing of two modes in the rotator frame is considered. Here we study the effects of this operator on the photon number sum and difference. The Glauber second-order correlation function is calculated, and the squeezing related to the frequency converter and the parametric amplifier has been discussed. The statistical investigations for the quasiprobability distribution functions are carried out.