Macroscopic quantum superposition states in nondegenerate parametric oscillation
M. D. Reid, Leo Krippner · Physical Review A · 1993
Nondegenerate oscillation is studied in the limit of a fast-decaying pump mode. The study is facilitated by analytic solutions of the positive P representation. In the absence of all individual signal and idler losses, states of definite signal-idler photon-number difference are generated. Determination of this photon number enables preparation of a macroscopic superposition state.