Long-distance free-space measurement-device-independent quantum key distribution

Abstract

Measurement-device-independent quantum key distribution (MDI-QKD), based on two-photon interference, is immune to all attacks against the detection system and allows a QKD network with untrusted relays. Since the MDI-QKD protocol was proposed, fibre-based implementations have been rapidly developed towards longer distance, higher key rates, and network verification. However, owing to the effect of atmospheric turbulence, MDI-QKD over free-space channel remains experimentally challenging. Here, by developing the robust adaptive optics system, high precision time synchronization and frequency locking between independent photon sources located far apart, we realised the first free-space MDI-QKD over a 19.2-km urban atmospheric channel, which well exceeds the effective atmospheric thickness. Our experiment takes the first step towards satellite-based MDI-QKD. Moreover, the technology developed here opens the way to quantum experiments in free space involving long-distance interference of independent single photons.

arXiv comment14 pages, 3 figures

References in corpus (28)

• Decoy State Quantum Key Distribution
• Measurement-device-independent quantum key distribution
• Satellite-to-ground quantum key distribution
• Secure quantum key distribution with realistic devices
• Beating the PNS attack in practical quantum cryptography
• Overcoming the rate-distance barrier of quantum key distribution without using quantum repeaters
• Ground-to-satellite quantum teleportation
• Measurement device independent quantum key distribution over 404 km optical fibre
• Satellite-relayed intercontinental quantum network
• Side-channel-free quantum key distribution
• Quantum teleportation using active feed-forward between two Canary Islands
• Quantum teleportation and entanglement distribution over 100-kilometre free-space channels
• High-rate quantum cryptography in untrusted networks
• Experimental measurement-device-independent quantum key distribution
• Real-world two-photon interference and proof-of-principle quantum key distribution immune to detector attacks
• Entangling Independent Photons by Time Measurement
• Measurement-device-independent quantum key distribution over 200 km
• Making the decoy-state measurement-device-independent quantum key distribution practically useful
• Quantum cryptography without detector vulnerabilities using optically-seeded lasers
• Measurement-device-independent quantum key distribution over untrustful metropolitan network
• High-speed measurement-device-independent quantum key distribution with integrated silicon photonics
• Experimental Twin-Field Quantum Key Distribution Through Sending-or-Not-Sending
• Three-intensity decoy state method for device independent quantum key distribution with basis dependent errors
• Improved statistical fluctuation analysis for measurement-device-independent quantum key distribution with three-intensity decoy-state method
• Experimental demonstration of high-rate measurement-device-independent quantum key distribution over asymmetric channels
• Superconducting nanowire single photon detection system for space applications
• High dimensional measurement device independent quantum key distribution on two dimensional subspaces
• Full Implementation of four-intensity Protocol for Measurement-Device-Independent Quantum Key Distribution over Asymmetric Channel

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• Advances in Space Quantum Communications
• Quantum Communication Using Semiconductor Quantum Dots
• Roadmap on Wavefront Shaping and deep imaging in complex media
• Quantum dots for photonic quantum information technology
• Adaptive-optics-enabled quantum communication: A technique for daytime space-to-Earth links
• Higher key rate of measurement-device-independent quantum key distribution through joint data processing
• Twin-field quantum key distribution without phase locking
• Towards metropolitan free-space quantum networks
• Quantum interferometers: principles and applications
• Analysis of satellite-to-ground quantum key distribution with adaptive optics
• Continuous-Variable Measurement-Device-Independent Quantum Key Distribution in Free-Space Channels
• Quantum key distribution over scattering channel
• Dynamic Mode Decomposition for Aero-Optic Wavefront Characterization
• Feasibility of space-based measurement-device-independent quantum key distribution
• Towards Global Quantum Key Distribution
• Measurement-device-independent quantum key distribution with insecure sources
• Proposal for distribution of multi-photon entanglement with optimal rate-distance scaling
• Pure-state photon-pair source with a long coherence time for large-scale quantum information processing
• Dynamic attenuation scheme in measurement-device-independent quantum key distribution over turbulent channels
• Hacking coherent-one-way quantum key distribution with present-day technology
• Phase-Matching Quantum Key Distribution without Intensity Modulation
• Probing arbitrary polarized photon pairs undergoing double Compton scatterings by a dedicated MC simulator validated with experimental data
• Wide-spectrum security of quantum key distribution
• A Survey on Continuous Variable Quantum Key Distribution for Secure Data Transmission: Toward the Future of Secured Quantum-Networks
• Simultaneous quantum identity authentication scheme utilizing entanglement swapping with secret key preservation
• Fourth-order moment of the light field in atmosphere for moderate and strong turbulence
• Quantum Technology for Military Applications
• Entanglement distribution via satellite: an evaluation of competing protocols assuming realistic free-space optical channels
• A Concise Primer on Solid-State Quantum Emitters
• Shaping the $g^{(2)}$ autocorrelation and photon statistics
• $\mathcal{P}\mathcal{T}$-Symmetric Quantum State Discrimination for Attack on BB84 Quantum Key Distribution
• Quantum communications infrastructure architecture: theoretical background, network structure and technologies. A review of recent studies from a European public infrastructure perspective
• Global-scale quantum networking using hybrid-channel quantum repeaters with relays based on a chain of balloons