Stable Polarization Entanglement based Quantum Key Distribution over Metropolitan Fibre Network

• URL: http://arxiv.org/abs/2007.01989v1
• Date: Sat, 4 Jul 2020 02:36:57 GMT
• Title: Stable Polarization Entanglement based Quantum Key Distribution over Metropolitan Fibre Network
• Authors: Yicheng Shi, Soe Moe Thar, Hou Shun Poh, James A. Grieve, Christian Kurtsiefer, Alexander Ling
• Abstract summary: We demonstrate a quantum key distribution implementation over deployed dark telecom fibers with polarisation-entangled photons generated at the O-band. One of the photons in the pairs are propagated through 10km of deployed fiber while the others are detected locally. This ensures continuous and stable QKD operation with an average QBER of 6.4% and a final key rate of 109 bits/s.
• Score: 55.41644538483948
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We demonstrate a quantum key distribution implementation over deployed dark telecom fibers with polarisation-entangled photons generated at the O-band. One of the photons in the pairs are propagated through 10km of deployed fiber while the others are detected locally. Polarisation drifts experienced by the photons propagating through the fibers are compensated with liquid crystal variable retarders. This ensures continuous and stable QKD operation with an average QBER of 6.4% and a final key rate of 109 bits/s.

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