High-dynamic free-space continuous-variable quantum access networks scheme via optical phased array

Le résumé fourni par la source

Wireless quantum networking can provide flexible, rapidly deployable, and secure connectivity for mobile and infrastructure-limited scenarios. However, existing free-space continuous-variable quantum key distribution (CV-QKD) systems are still limited to point-to-point links, while dynamic multi-user access is hindered by bulky and slow mechanical beam steering. In this paper, we propose a free-space multi-user CV-QKD scheme based on an optical phased array. Based on a full-link model accounting for device imperfections and channel effects, numerical results demonstrate the feasibility of the proposed scheme under different atmospheric conditions and suggest its robustness and scalability. This work provides a promising route to rapidly reconfigurable free-space quantum access networks for highly dynamic near-range scenarios such as unmanned aerial vehicle swarms and emergency communications, and may inform future extensions toward satellite-based quantum networking.

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