articleScience AdvancesJan 3, 2024GOLD OA

Long-distance continuous-variable quantum key distribution over 100-km fiber with local local oscillator

Technical University of Denmark · Palacký University Olomouc

PubMed
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Abstract

Quantum key distribution (QKD) enables two remote parties to share encryption keys with security based on the laws of physics. Continuous-variable (CV) QKD with coherent states and coherent detection integrates well with existing telecommunication networks. Thus far, long-distance CV-QKD has only been demonstrated using a highly complex scheme where the local oscillator is transmitted, opening security loopholes for eavesdroppers and limiting potential applications. Here, we report a long-distance CV-QKD experiment with a locally generated local oscillator over a 100-kilometer fiber channel with a total loss of 15.4 decibels. This record-breaking distance is achieved by controlling the phase noise-induced…

Citation impact

110
total citations
FWCI
33.58
Percentile
100%
References
50
Citations per year

Authors

6

Topics & keywords

Keywords
  • Quantum key distribution
  • Continuous variable
  • Local oscillator
  • Variable (mathematics)
  • Key (lock)
  • Statistical physics
  • Quantum
  • Distribution (mathematics)
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