Fig. 3 | npj Quantum Information

Fig. 3

From: Experimental quantum network coding

Fig. 3

Fidelities of crossly transmitted quantum states. a The green bar represents \(F_{S_1 \to R_2}\), and the yellow bars represent \(F_{S_2 \to R_1}\). The pair-appeared bars represent fidelities measured simultaneously at R1 and R2. For example, HR means that S1 delivers |H〉 and S2 delivers |R〉. The red line represents the threshold of Fth = 0.9503. The fourfold coincidence is ~1.5 counts per second. We accumulate coincidences for 240 s, and a total of 720 counts for each two-state transition. The error bars are calculated assuming a Poisson statistics for the coincidence counts and Gaussian error propagation. b Histogram of state fidelities

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