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

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JournalJOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
DateSubmitted - 17 Oct 2018
DateAccepted/In press - 14 Jan 2019
DateE-pub ahead of print - 22 Feb 2019
DatePublished (current) - 15 Jul 2019
Issue number3
Volume36
Pages (from-to) B109-B115
Early online date22/02/19
Original languageEnglish

Abstract

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 shotnoise 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.

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© 2019 Optical Society of America. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

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  • quant-ph

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