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

• URL: http://arxiv.org/abs/2406.14166v1
• Date: Thu, 20 Jun 2024 10:10:48 GMT
• Title: Discrete-Modulated Continuous-Variable Quantum Key Distribution in Satellite-to-Ground Communication
• Authors: Shi-Gen Li, Chen-Long Li, Wen-Bo Liu, Hua-Lei Yin, Zeng-Bing Chen,
• Abstract summary: Continuous-variable quantum key distribution is a strong candidate for space-ground quantum communication. We derive key rates for discrete-modulated continuous-variable quantum key distribution protocols in free-space channel environments.
• Score: 1.9345871987291465
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: 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 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, we derive key rates 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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