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Hybrid quantum communication protocol for fiber and atmosphere channel

https://doi.org/10.17586/2220-8054-2024-15-5-654-657

Abstract

In this paper, we explore a hybrid quantum communication protocol that operates concurrently over fiber optic and atmospheric channels. This new protocol addresses challenges in urban settings where laying optical fiber may be impractical or costly. By integrating the subcarrier wave (SCW) quantum key distribution (QKD) with phase coding, our approach enhances the flexibility and reliability of quantum communication systems. We have developed and tested an atmospheric optical module equipped with an auto-tuning system to ensure precise optical axis alignment, crucial for minimizing signal loss in turbulent environments. Experimental results demonstrate stable sifted key rates and low quantum bit error rate (QBER) across various channel lengths, confirming the efficacy of our hybrid protocol in securing communication over diverse transmission environments.

About the Authors

Ilnur Z. Latypov
FRC Kazan Scientific Center of the Russian Academy of Sciences
Russian Federation

Ilnur Z. Latypov

ul. Lobachevskogo, 2/31, POB 261, Kazan, 420111



Vladimir V. Chistyakov
ITMO University; Quanttelecom LLC.
Russian Federation

Vladimir V. Chistyakov

49, St. Petersburg, 197101;  6 Line, 59, St. Petersburg, 199178



Maxim A. Fadeev
ITMO University; Russian Quantum Center
Russian Federation

Maxim A. Fadeev

49, St. Petersburg, 197101; Skolkovo, Moscow 121205



Danil V. Sulimov
ITMO University
Russian Federation

Danil V. Sulimov

Kronverkskiy, 49, St. Petersburg, 197101



Alexey K. Khalturinsky
Quanttelecom LLC.
Russian Federation

Alexey K. Khalturinsky

6 Line, 59, St. Petersburg, 199178



Sergey M. Kynev
ITMO University; Quanttelecom LLC.
Russian Federation

Sergey M. Kynev

49, St. Petersburg, 197101; 6 Line, 59, St. Petersburg, 199178



Vladimir I. Egorov
ITMO University; Quanttelecom LLC.
Russian Federation

Vladimir I. Egorov

6 Line, 59, St. Petersburg, 199178



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Review

For citations:


Latypov I.Z., Chistyakov V.V., Fadeev M.A., Sulimov D.V., Khalturinsky A.K., Kynev S.M., Egorov V.I. Hybrid quantum communication protocol for fiber and atmosphere channel. Nanosystems: Physics, Chemistry, Mathematics. 2024;15(5):654-657. https://doi.org/10.17586/2220-8054-2024-15-5-654-657

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ISSN 2220-8054 (Print)
ISSN 2305-7971 (Online)