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<p>Free-space quantum key distribution (QKD) is crucial for establishing secure global quantum communication networks. The realization of such networks will critically depend on airborne platforms, which enable the deployment of mobile nodes and adaptive topology reconfiguration. When analyzing optical transmission in airborne environments, we must account for various factors including diffraction, atmospheric extinction, pointing errors, atmospheric turbulence, and the boundary layer (BL) effects specific to airborne platforms. Unlike previous studies that have primarily focused on atmospheric turbulence, this work investigates the free-space optical (FSO) channel in airborne environments by incorporating BL effects, where we cannot ignore photon deflection caused by the BL. Furthermore, we establish fundamental limits for quantum communication with BL effects and evaluate the achievable secret key rate for continuous-variable quantum key distribution (CV-QKD).</p>

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Quantum communications in airborne environment with boundary layer effects

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Zhi-Feng Deng,
  • Jie Tang,
  • Ya Wang,
  • Jia-Hao Li,
  • Hao-Ran Hu,
  • Dan Wu,
  • Yue-Xiang Cao,
  • Ying Liu,
  • Xing-Yu Wang,
  • Hua-Zhi Lun,
  • Jia-Hua Wei,
  • Hui-Cun Yu,
  • Lei Shi

摘要

Free-space quantum key distribution (QKD) is crucial for establishing secure global quantum communication networks. The realization of such networks will critically depend on airborne platforms, which enable the deployment of mobile nodes and adaptive topology reconfiguration. When analyzing optical transmission in airborne environments, we must account for various factors including diffraction, atmospheric extinction, pointing errors, atmospheric turbulence, and the boundary layer (BL) effects specific to airborne platforms. Unlike previous studies that have primarily focused on atmospheric turbulence, this work investigates the free-space optical (FSO) channel in airborne environments by incorporating BL effects, where we cannot ignore photon deflection caused by the BL. Furthermore, we establish fundamental limits for quantum communication with BL effects and evaluate the achievable secret key rate for continuous-variable quantum key distribution (CV-QKD).