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) FWM + FWM (BS) network. (a) FWM + FWM network. is coherent input signal. and are vacuum inputs. and are the power gains of cell and cell, respectively. , , and are the triple output beams. (b) FWM+BS network. is coherent input signal. and are vacuum inputs. is the power gain of cell. is the transmission of the BS. , , and are the triple output beams.