Non-Gaussian approach: Withstanding loss and noise of multi-scattering underwater channel for continuous-variable quantum teleportation

doi:10.1088/1674-1056/ace681

Abstract Underwater quantum communication plays a crucial role in ensuring secure data transmission and extensible quantum networks in underwater environments. However, the implementation of such applications encounters challenges due to the light attenuation caused by the complicated natural seawater. This paper focuses on employing a model based on seawater chlorophyll-a concentration to characterize the absorption and scattering of light through quantum channels. We propose a multi-scattering random channel model, which demonstrates characteristics of the excess noise in different propagation directions of communication links. Furthermore, we consider the fidelity of a continuous-variable quantum teleportation through seawater channel. To enhance transmission performance, non-Gaussian operations have been conducted. Numerical simulations show that incorporating non-Gaussian operations enables the protocol to achieve higher fidelity transmission or lower fidelity fading rates over longer transmission distances.

Keywords: continuous-variable quantum teleportation multi-scattering underwater channel non-Gaussian operations

Received: 10 April 2023
Revised: 05 July 2023
Accepted manuscript online: 12 July 2023

PACS:	03.67.Hk	(Quantum communication)
	03.67.Dd	(Quantum cryptography and communication security)
	03.67.-a	(Quantum information)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61871407), the Natural Science Foundation of Hunan Province, China (Grant No. 2021JJ30878), and the Key Research and Development Program of Hunan Province, China (Grant Nos. 2020GK4063 and 2022GK2016).

Corresponding Authors: Zhiyue Zuo, Xinchao Ruan, Ying Guo
E-mail: zuo.zhiyue.csu@gmail.com;rxc1126@csu.edu.cn;guoying@bupt.edu.cn

Cite this article:

Hao Wu(吴昊), Hang Zhang(张航), Yiwu Zhu(朱益武), Gaofeng Luo(罗高峰), Zhiyue Zuo(左峙岳), Xinchao Ruan(阮新朝), and Ying Guo(郭迎) Non-Gaussian approach: Withstanding loss and noise of multi-scattering underwater channel for continuous-variable quantum teleportation 2023 Chin. Phys. B 32 100311

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Non-Gaussian approach: Withstanding loss and noise of multi-scattering underwater channel for continuous-variable quantum teleportation

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