Stable Polarization Entanglement based Quantum Key Distribution over Metropolitan Fibre Network

Yicheng Shi; Soe Moe Thar; Hou Shun Poh; James A. Grieve; Christian Kurtsiefer; Alexander Ling

doi:10.1063/5.0021755

Stable Polarization Entanglement based Quantum Key Distribution over Metropolitan Fibre Network

Quantum Physics 2020-09-23 v1

Authors: Yicheng Shi , Soe Moe Thar , Hou Shun Poh , James A. Grieve , Christian Kurtsiefer , Alexander Ling

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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.

Keywords

quantum key distribution quantum networks quantum entanglement

Cite

@article{arxiv.2007.01989,
  title  = {Stable Polarization Entanglement based Quantum Key Distribution over Metropolitan Fibre Network},
  author = {Yicheng Shi and Soe Moe Thar and Hou Shun Poh and James A. Grieve and Christian Kurtsiefer and Alexander Ling},
  journal= {arXiv preprint arXiv:2007.01989},
  year   = {2020}
}

Comments

5 pages, 4 figures

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