Coherent-State-Based Twin-Field Quantum Key Distribution
arXiv:1901.05009 · doi:10.1038/s41598-019-50429-0
Abstract
Large-scale quantum communication networks are still a huge challenge due to the rate-distance limit of quantum key distribution (QKD). Recently, twin-field (TF) QKD has been proposed to overcome this limit. Here, we prove that coherent-state-based TF-QKD is a time-reversed entanglement protocol, where the entanglement generation is realized with entanglement swapping operation via an entangled coherent state measurement. We propose a coherent-state-based TF-QKD with optimal secret key rate under symmetric and asymmetric channels by using coherent state and cat state coding. Furthermore, we show that our protocol can be converted to all recent coherent-state-based TF-QKD protocols by using our security proof. By using the entanglement purification with two-way classical communication, we improve the transmission distance of all coherent-state-based TF-QKD protocols.
11 pages, 3 figures, including supplemental material, Published version
References in corpus (19)
- Satellite-to-ground quantum key distribution
- Overcoming the rate-distance barrier of quantum key distribution without using quantum repeaters
- Measurement device independent quantum key distribution over 404 km optical fibre
- Secure quantum key distribution over 421 km of optical fiber
- Sending or not sending: twin-field quantum key distribution with large misalignment error
- Satellite-to-ground quantum communication using a 50-kg-class micro-satellite
- Experimental quantum key distribution beyond the repeaterless secret key capacity
- Fault-tolerant linear optical quantum computing with small-amplitude coherent states
- Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-Sending
- Twin-field Quantum Key Distribution without Phase Post-Selection
- Proof-of-principle experimental demonstration of twin-field type quantum key distribution
- Simple security analysis of phase-matching measurement-device-independent quantum key distribution
- Beating the fundamental rate-distance limit in a proof-of-principle quantum key distribution system
- Improved results for sending-or-not-sending twin-field quantun key distribution: breaking the absolute limit of repeaterless key rate
- Measurement-Device-Independent Twin-Field Quantum Key Distribution
- Remote preparation of continuous-variable qubits using loss-tolerant hybrid entanglement of light
- Versatile security analysis of measurement-device-independent quantum key distribution
- Practical decoy-state method for twin-field quantum key distribution
- Long distance measurement-device-independent quantum key distribution with coherent-state superpositions
Cited by in corpus (21)
- Advances in Quantum Cryptography
- Breaking the Rate-Loss Bound of Quantum Key Distribution with Asynchronous Two-Photon Interference
- Secure Quantum Secret Sharing without Signal Disturbance Monitoring
- Feasibility Assessment For Practical Continuous Variable Quantum Key Distribution Over The Satellite-to-Earth Channel
- Finite-key analysis for twin-field quantum key distribution with composable security
- Long-distance twin-field quantum key distribution with entangled sources
- Finite-key Analysis for Quantum Conference Key Agreement with Asymmetric Channels
- Overcoming the rate-distance limit of device-independent quantum key distribution
- Simple security proof of coherent-one-way quantum key distribution
- Scalable High-Rate Twin-Field Quantum Key Distribution Networks without Constraint of Probability and Intensity
- High key rate quantum conference key agreement with unconditional security
- Surpassing the repeaterless bound with a photon-number encoded measurement-device-independent quantum key distribution protocol
- Recent advances on quantum key distribution overcoming the linear secret key capacity bound
- Noiseless Linear Amplification and Loss-Tolerant Quantum Relay using Coherent State Superpositions
- Differential Phase Shift Quantum Secret Sharing Using a Twin Field with Asymmetric Source Intensities
- Satellite-based Distribution of Hybrid Entanglement
- Improving the performance of twin-field quantum key distribution with advantage distillation technology
- Finite-key analysis for quantum key distribution with discrete phase randomization
- Multicomponent cat states with sub-Planckian structures and their optomechanical analogues
- Phase-Matching Quantum Key Distribution without Intensity Modulation
- CHSH Bell Tests For Optical Hybrid Entanglement