Fig. 4: Results of six-state measurement-device-independent quantum key distribution (MDI-QKD) protocol with and without advantage distillation. | Communications Physics

Fig. 4: Results of six-state measurement-device-independent quantum key distribution (MDI-QKD) protocol with and without advantage distillation.

From: Improving the performance of practical decoy-state quantum key distribution with advantage distillation technology

Fig. 4

a The relationship between the transmission distance and the secret key rate, the blue line is the secret key rate without advantage distillation (b = 1), the red line is the secret key rate with the advantage distillation technology (b > 1), and the green line is the Pirandola- Laurenza-Ottaviani-Banchi (PLOB) bound. b The relationship between the transmission distance and the optimal b values, the advantage distillation technology (b > 1) can improve the secret key rate when the transmission distance is larger than 189 km.

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