Optimized-eight-state cv-qkd protocol outperforming Gaussian modulation based protocols

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8 Scopus citations


In this paper, an optimized-eight-state CV-QKD protocol is proposed significantly outperforming previously introduced discrete modulation (DM) protocols as well as the corresponding Gaussian modulation (GM)-based CV-QKD protocols for practical reconciliation efficiencies values in terms of both secret-key rate (SKR) and achievable distance. The proposed CV-QKD protocol also outperforms, in terms of SKR, the corresponding high-cost single-photon DV-QKD scheme, employing an array of multiplexed single-photon detectors, for several orders of magnitude. We also describe a generalized RF-Assisted CV-QKD scheme with heterodyne detection applicable to arbitrary DM scheme, insensitive to the laser phase noise and frequency offset fluctuations.

Original languageEnglish (US)
Article number8732438
JournalIEEE Photonics Journal
Issue number4
StatePublished - Aug 2019


  • Quantum key distribution (QKD)
  • continuous variable (CV)-QKD
  • discrete modulation-based protocols.
  • prepare-And-measure CV-QKD protocols

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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