Ideal and destructive state reductions of correlated light fields and the continuous measurement of photon number
Vlasta Peřinová, A. Lukš, J. Křepelka · Physical Review A · 1996
A continuous photon-number measurement has been assumed in the idler mode output from parametric down-conversion for an initial coherent state. The states generated in the signal mode due to the mode entanglement and the effects of both the destructive and the ideal reduction are described in terms of a quasidistribution of the complex field amplitude as well as of the density-matrix elements. The resulting near-number states in the ideal case are suitable for the study of the dynamics of phase and quadrature distributions rotated by the actual preferred phase. These states exhibit both number and quadrature squeezing. \textcopyright{} 1996 The American Physical Society.