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

作　　者：吴昊 张航 朱益武 罗高峰 左峙岳 阮新朝 郭迎 Hao Wu;Hang Zhang;Yiwu Zhu;Gaofeng Luo;Zhiyue Zuo;Xinchao Ruan;Ying Guo(School of Automation,Central South University,Changsha 410083,China;School of Computer Science,Beijing University of Posts and Telecommunications,Beijing 100876,China)

机构地区：[1]School of Automation,Central South University,Changsha 410083,China [2]School of Computer Science,Beijing University of Posts and Telecommunications,Beijing 100876,China

出　　处：《Chinese Physics B》2023年第10期262-272,共11页中国物理B（英文版）

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

摘　　要：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.

关 键 词：continuous-variable quantum teleportation multi-scattering underwater channel non-Gaussian operations 

分 类 号：TN929.3[电子电信—通信与信息系统] O413[电子电信—信息与通信工程]