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. (16) and (17). (a) The green region (1, 2) is the region of and the red line is . (b) The magenta region (1, 3) is the region of .