Continuous variable quantum key distribution with multi-mode signals for noisy detectors

Rupesh Kumar, Xinke Tang, Adrian Wonfor, Richard Penty, Ian White

Research output: Contribution to journalArticlepeer-review

12 Citations (SciVal)


This paper proposes a multi-mode Gaussian modulated continuous variable quantum key distribution (CV-QKD) scheme able to operate at high bandwidth despite using conventional noisy, coherent detectors. We demonstrate enhancement in shot-noise sensitivity as well as reduction in the electronic noise variance of the coherent receiver of the multi-mode CV-QKD system. A proof-of-concept simulation is presented using multiple modes; this demonstrates an increase in signal-to-noise ratio and secure key rate at various transmission distances with increasing signal modes.

Original languageEnglish
Pages (from-to)B109-B115
JournalJournal of the Optical Society of America B: Optical Physics
Issue number3
Early online date22 Feb 2019
Publication statusPublished - 1 Mar 2019

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics


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