Higher key rate of measurement-device-independent quantum key distribution through joint data processing

Abstract

We propose a method named as double-scanning method, to improve the key rate of measurement-device-independent quantum key distribution (MDI-QKD) drastically. In the method, two parameters are scanned simultaneously to tightly estimate the counts of single-photon pairs and the phase-flip error rate jointly. Numerical results show that the method in this work can improve the key rate by $35\%-280\%$ in a typical experimental set-up. Besides, we study the optimization of MDI-QKD protocol with all parameters including the source parameters and failure probability parameters, over symmetric channel or asymmetric channel. Compared with the optimized results with only the source parameters, the all-parameter-optimization method could improve the key rate by about $10\%$.

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Cited by in corpus (12)

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• Composable security for practical quantum key distribution with two way classical communication
• Advantages of Asynchronous Measurement-Device-Independent Quantum Key Distribution in Intercity Networks
• Mode-pairing quantum key distribution with advantage distillation
• Feasibility of space-based measurement-device-independent quantum key distribution
• Experimental Measurement-Device-Independent Quantum Cryptographic Conferencing
• Efficient Quantum Digital Signatures over Long Distances with Likely Bit Strings
• Measurement-Device-Independenization of Quantum Key Distribution Protocols
• Asynchronous measurement-device-independent quantum digital signatures
• Phase-Matching Quantum Key Distribution without Intensity Modulation
• Experimental measurement-device-independent quantum key distribution with the double-scanning method
• Optimizing Epsilon Security Parameters in QKD