Maintenance-free Operation of WDM Quantum Key Distribution System through a Field Fiber over 30 Days

Abstract

Maintenance-free wavelength-division-multiplexing quantum key distribution for 30 days was achieved through a 22-km field fiber. Using polarization-independent interferometers and stabilization techniques, we attained a quantum bit error rate as low as 1.70% and a key rate as high as 229.8 kbps, making the record of total secure key of 595.6 Gbits accumulated over an uninterrupted operation period.

6 pages, 4 figures

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• Boosting the secret key rate in a shared quantum and classical fibre communication system
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• Passively stable distribution of polarisation entanglement over 192 km of deployed optical fibre
• Quantum key distribution with dissipative Kerr soliton generated by on-chip microresonators
• A scalable network for simultaneous pairwise quantum key distribution via entanglement-based time-bin coding
• Experimental transmission of quantum digital signatures over 90-km of installed optical fiber using a differential phase shift quantum key distribution system
• Backflash light characterization to prevent QKD zero-error hacking
• Optimal entanglement distribution policies in homogeneous repeater chains with cutoffs
• Optimal design and performance evaluation of free-space Quantum Key Distribution systems
• Long-term transmission of entangled photons from single quantum dot over deployed fiber
• Security of quantum key distribution with non-I.I.D. light sources
• Interactive simulations for quantum key distribution
• Sub-ns timing accuracy for satellite quantum communications
• Modeling Optical Fiber Space Division Multiplexed Quantum Key Distribution Systems
• Performance metrics for the continuous distribution of entanglement in multi-user quantum networks
• Countermeasure against blinding attacks on low-noise detectors with background noise cancellation scheme
• Secure secondary utilization system of genomic data using quantum secure cloud
• Long-term secure distributed storage using quantum key distribution network with third-party verification
• Modified E91 protocol demonstration with hybrid entanglement photon source
• Resource-Efficient Real-Time Polarization Compensation for MDI-QKD with Rejected Data