Fig. 3
Experimental setup and results for multi-channel entanglement distribution of one sender and one receiver. a Experimental setup. A silicon-on-insulator waveguide on Chip I serves as a quantum source. Chip II is the energy-time entanglement preparation and analysis chip. b-c Typical histograms of the interference peaks for CH11&CH7 of the AWG. The time resolution of the histograms is 40 ps. d The raw coincidence of the central peak for i1-s1 changes with phase. The black dots are measured coincidences. The gray curve is obtained by fitting the measured results using the sine function. The error bar comes from the Poisson statistical distribution. Red and blue dots refer to single channel counts of idler and signal photons, respectively. PC: polarization controller; VOA: variable optical attenuator; EDFA: erbium-doped fiber amplifier