Characterization of the pairwise correlations in different quantum networks consisting of four-wave mixers and beamsplitters

Qi Jian¹, Xin Jun¹, Wang Hai-Long^{1, †}, Jing Jie-Tai^{1, 2, ‡}

(color online) The region plot of Eqs. (12)–(14). The purple region (1, 2) is the region of , the red line (1, 3) is the region of 1 (), and the cyan region (2, 3) is the region of 1. Inset: .