Quantum frequency doubling based on tripartite entanglement with cavities
Guo Juan1, 2, Wei Zhi-Feng1, 2, Zhang Su-Ying2, †,
       

Correlation fluctuation spectra S at Ω = 0 versus pump parameter σ for different values of squeezing factor r, the transmission of the output coupler mirror γ2/γ1 = 2. The squares, circles, and triangles are for squeezing factor r = 5, 1, 0.5 respectively.