卫星到地面通信中的离散调制连续可变量子密钥分发

IF 4.4 Q1 OPTICS
Shi-Gen Li, Chen-Long Li, Wen-Bo Liu, Hua-Lei Yin, Zeng-Bing Chen
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引用次数: 0

摘要

星地量子通信是全球量子网络的基石,预示着量子信息未来的到来。连续可变量子密钥分发因其简单、稳定、易于实现,特别是对空间背景光噪声的鲁棒性,成为空地量子通信的有力候选方案。最近,离散调制连续可变协议因其较低的实施要求、可接受的安全密钥率以及与现有基础设施的明显兼容性而受到越来越多的关注。本文通过数值模拟,推导了自由空间信道环境中各种条件下离散调制连续可变量子密钥分发协议的密钥率,揭示了其在卫星对地通信中应用的可行性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Discrete-Modulated Continuous-Variable Quantum Key Distribution in Satellite-to-Ground Communication

Discrete-Modulated Continuous-Variable Quantum Key Distribution in Satellite-to-Ground Communication

Satellite-to-ground quantum communication constitutes the cornerstone of the global quantum network, heralding the advent of the future of quantum information. Continuous-variable quantum key distribution is a strong candidate for the space-ground quantum communication due to its simplicity, stability, and ease of implementation, especially for the robustness of space background light noise. Recently, the discrete-modulated continuous-variable protocol has garnered increased attention, owing to its lower implementation requirements, acceptable security key rate, and pronounced compatibility with extant infrastructures. Here, key rates are derived for discrete-modulated continuous-variable quantum key distribution protocols in free-space channel environments across various conditions through numerical simulation, revealing the viability of its application in satellite-to-ground communication.

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