Figure 5From: Field trial of a three-state quantum key distribution scheme in the Florence metropolitan areaSecret key rate generation. Expected SKR as a function of channel losses, together with the experimental rates evaluated in our continuous states exchange for the two cases (see Fig. 4). The red dot represents the case with only quantum light, whereas the blue dot represents the case with both classical and quantum light propagated simultaneously through the same fiber. The experimental data are averaged over 10 hours and 4 hours of continuous acquisition respectivelyBack to article page