Figure 3From: Demonstration of 75 km-fiber quantum clock synchronization in quantum entanglement distribution networkThe coincidence count histograms of \(G^{(2)}(\tau _{s-u})\) and \(G^{(2)}(\tau _{s-u-s})\) in the first 100 s experiment. (a) and (b) [(c) and (d)] show the coincidence histograms \(G^{(2)}(\tau _{s-u})\) and \(G^{(2)}(\tau _{s-u-s})\) with [without] DCBack to article page