Plug&Play subcarrier wave quantum key distribution with deep modulation

We report a quantum key distribution using subcarrier wave encoding in Plug&Play configuration. Our detailed study shows how subcarrier encoding operates in a presence of Rayleigh back-scattering, chromatic dispersion and other experimental negative factors that occur in Plug&Play configurat...

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Bibliographic Details
Published in:arXiv.org 2021-11
Main Authors: Bannik, Oleg I, Moiseev, E S
Format: Article
Language:English
Subjects:
Configurations
Modulation
Quantum cryptography
Subcarriers
Online Access:Get full text
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Summary:We report a quantum key distribution using subcarrier wave encoding in Plug&Play configuration. Our detailed study shows how subcarrier encoding operates in a presence of Rayleigh back-scattering, chromatic dispersion and other experimental negative factors that occur in Plug&Play configuration. We propose and experimentally demonstrate a novel regime for the subcarrier wave encoding, where simultaneous detection of two logical states in a single basis is combined with robustness and simplicity of the original protocol. This deep modulation regime shows reliable quantum communication with losses up to 20 dB and promises a twice increase in secret key generation rate in comparison with the original subcarrier wave quantum key distribution in one-way or Plug&Play configurations.
ISSN:2331-8422
DOI:10.48550/arxiv.2111.04546