连续变量QKD自由空间卫星量子通信信道的混合噪声建模

IF 6.7 2区 计算机科学 Q1 TELECOMMUNICATIONS
Mouli Chakraborty;Anshu Mukherjee;Ioannis Krikidis;Avishek Nag;Subhash Chandra
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引用次数: 0

摘要

本研究推进了量子密钥分配(QKD)在自由空间光学(FSO)卫星量子通信中的应用。提出了一种创新的卫星量子信道模型,并推导出通过该信道可实现的秘密量子密钥分发率。与将量子信道中的噪声近似为高斯分布的现有模型不同,该模型结合了混合量子噪声分析,同时考虑了量子泊松噪声和经典加性白高斯噪声(AWGN)。这种混合方法承认连续变量(CV)高斯量子信道在反向调和(RR)设置的集体攻击下对量子和经典噪声的双重脆弱性,从而提供了更现实的量子密钥速率(SKR)评估。研究了不同影响参数下渐近SKR随信噪比和卫星高度的变化规律。我们识别并分析了影响SKR的关键因素,如协调效率、电噪声、传输系数、检测效率、传输效率、多余噪声和量子泊松噪声参数。这些参数对于确定FSO卫星量子信道的渐近SKR至关重要,突出了基于卫星的量子通信的挑战。在有限大小和渐近SKR的基础上进行了比较研究。它为理解和优化基于卫星的QKD系统中的渐近SKR提供了一个全面的框架,为更高效和安全的量子通信网络铺平了道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Hybrid Noise Approach to Modeling of Free-Space Satellite Quantum Communication Channel for Continuous-Variable QKD
This research advances the application of Quantum Key Distribution (QKD) in Free-Space Optics (FSO) satellite-based quantum communication. It proposes an innovative satellite quantum channel model and derives the secret quantum key distribution rate achievable through this channel. Unlike existing models that approximate the noise in quantum channels as merely Gaussian distributed, this model incorporates a hybrid quantum noise analysis, accounting for both quantum Poissonian noise and classical Additive-White-Gaussian Noise (AWGN). This hybrid approach acknowledges the dual vulnerability of continuous variables (CV) Gaussian quantum channels to both quantum and classical noise under collective attack with reverse-reconciliation (RR) setting, thereby offering a more realistic assessment of the quantum Secret Key Rate (SKR). This work delves into the variation of asymptotic SKR with the Signal-to-Noise Ratio (SNR) and satellite altitudes under various influencing parameters. We identify and analyze critical factors such as reconciliation efficiency, electrical noise, transmission coefficient, detection efficiency, transmission efficiency, excess noise, and the quantum Poissonian noise parameter impacting the SKR. These parameters are pivotal in determining the asymptotic SKR in FSO satellite quantum channels, highlighting the challenges of satellite-based quantum communication. A comparative study has been provided based on the finite-size and asymptotic SKR. It provides a comprehensive framework for understanding and optimizing asymptotic SKR in satellite-based QKD systems, paving the way for more efficient and secure quantum communication networks.
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来源期刊
IEEE Transactions on Green Communications and Networking
IEEE Transactions on Green Communications and Networking Computer Science-Computer Networks and Communications
CiteScore
9.30
自引率
6.20%
发文量
181
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