Entanglement Model for Mode-Pairing Quantum Key Distribution
arXiv:2304.09621 · doi:10.1103/PhysRevResearch.7.023102
Abstract
Mode-pairing (MP) quantum key distribution (QKD) eliminates the requirements of phase locking and phase tracking compared with twin-field (TF) QKD while still surpassing the fundamental rate-distance limit of QKD. The complexity of the experimental implementation is reduced while the efficiency can still be guaranteed. In MP-QKD, two communication parties need to pair two effective rounds according to the announced results by the third party. Therefore, it is not intuitive how to provide an entanglement protocol equivalent to the prepare-and-measure protocol for proving security. At present, the security of MP-QKD is rigorously proven by examining the consistency of the states detailly between MP-QKD and the fixed-pairing scheme under all of Eve's possible interference to obtain the equivalence, and verifying the security of the latter. Here, we directly present an entanglement model for MP-QKD by proposing a free-pairing entanglement scheme that is equivalent to MP-QKD. This entanglement model simplifies the security proof and provides a clearer insight into the foundation of MP-QKD. Besides, it could provide a theoretical framework for the comprehensive analysis of MP-QKD, such as facilitating practical security analysis. Additionally, we propose an optimized pairing strategy based on the entanglement model. The simulation results show an enhancement of 163\% in pairing efficiency with a reasonable pairing interval .
24 pages, 3 figures
References in corpus (39)
- Quantum cryptography: Public key distribution and coin tossing
- Decoy State Quantum Key Distribution
- Measurement-device-independent quantum key distribution
- Secure quantum key distribution with realistic devices
- Beating the PNS attack in practical quantum cryptography
- General Benchmarks for Quantum Repeaters
- Fundamental Limits of Repeaterless Quantum Communications
- Overcoming the rate-distance barrier of quantum key distribution without using quantum repeaters
- Measurement device independent quantum key distribution over 404 km optical fibre
- Side-channel-free quantum key distribution
- Experimental measurement-device-independent quantum key distribution
- Security in Quantum Cryptography
- Sending or not sending: twin-field quantum key distribution with large misalignment error
- Experimental quantum key distribution beyond the repeaterless secret key capacity
- Breaking the Rate-Loss Bound of Quantum Key Distribution with Asynchronous Two-Photon Interference
- Twin-Field Quantum Key Distribution over 511 km Optical Fiber Linking two Distant Metropolitans
- 600 km repeater-like quantum communications with dual-band stabilisation
- Alternative schemes for measurement-device-independent quantum key distribution
- Phase-Matching Quantum Key Distribution
- Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-Sending
- Twin-field Quantum Key Distribution without Phase Post-Selection
- Surpassing the rate-transmittance linear bound of quantum key distribution
- Quantum key distribution surpassing the repeaterless rate-transmittance bound without global phase locking
- Proof-of-principle experimental demonstration of twin-field type quantum key distribution
- Simple security analysis of phase-matching measurement-device-independent quantum key distribution
- Experimental Quantum Communication Overcomes the Rate-loss Limit without Global Phase Tracking
- Field Test of Twin-Field Quantum Key Distribution through Sending-or-Not-Sending over 428 km
- Coherent phase transfer for real-world twin-field quantum key distribution
- Twin-field quantum key distribution without optical frequency dissemination
- Experimental mode-pairing measurement-device-independent quantum key distribution without global phase-locking
- Quantum key distribution over 658 km fiber with distributed vibration sensing
- Twin-field quantum key distribution without phase locking
- Field test of mode-pairing quantum key distribution
- Advantages of Asynchronous Measurement-Device-Independent Quantum Key Distribution in Intercity Networks
- Asynchronous Quantum Repeater using Multiple Quantum Memory
- Mode-pairing quantum key distribution with advantage distillation
- Scalable High-Rate Twin-Field Quantum Key Distribution Networks without Constraint of Probability and Intensity
- Asymmetric mode-pairing quantum key distribution
- Asynchronous measurement-device-independent quantum key distribution with hybrid source