Airborne Quantum Key Distribution with Boundary Layer Effects
Airborne Quantum Key Distribution with Boundary Layer Effects
复制标题
具有边界层效应的机载量子密钥分发
DOI：
10.1140/epjqt/s40507-021-00115-w
复制
发表时间：
2021
影响因子：
5.3
通讯作者：
Shi Lei
中科院分区：
文献类型：
--
作者：
Yu Huicun;Tang Bangying;Huan Chen;Xue Yang;Tang Jie;Yu Wanrong;Liu Bo;Shi Lei
随着地面光纤量子网络和星载量子节点的发展，机载量子密钥分发（QKD）成为连接地面光纤和卫星的灵活纽带，是建立移动的、按需的、实时覆盖的量子网络的有效解决方案。然而，当飞行速度大于0.3Ma时，随机分布的边界层总是围绕在飞行器表面，这将给透射光子带来随机波前畸变、抖动和额外的强度衰减。在这篇文章中，我们提出了一个性能评估方案的机载QKD与边界层效应。对光子偏转角和波前像差效应的分析结果表明，边界层引起的气动光学效应不容忽视，会严重降低最终的安全密钥速率。在我们提出的机载QKD场景中，边界层将给传输的光子带来0.3.5 dB的损失，并使安全密钥速率降低0.70.9%。在容许量子比特误码率设置为8%的情况下，飞机和地面站之间的建议量子通信方位角在55度以内。此外，还提出了采用最佳信标激光器模块和自适应光学模块，以提高机载QKD系统性能的建议。详细的机载QKD性能评估研究可以为未来的机载量子通信设计提供参考。
With the substantial progress of terrestrial fiber-based quantum networks and satellite-based quantum nodes, airborne quantum key distribution (QKD) is now becoming a flexible bond between terrestrial fiber and satellite, which is an efficient solution to establish a mobile, on-demand, and real-time coverage quantum network. However, the random distributed boundary layer is always surrounded to the surface of the aircraft when the flight speed larger than 0.3 Ma, which would introduce random wavefront aberration, jitter and extra intensity attenuation to the transmitted photons. In this article, we propose a performance evaluation scheme of airborne QKD with boundary layer effects. The analyzed results about the photon deflection angle and wavefront aberration effects, show that the aero-optical effects caused by the boundary layer can not be ignored, which would heavily decrease the final secure key rate. In our proposed airborne QKD scenario, the boundary layer would introduce ∼3.5 dB loss to the transmitted photons and decrease ∼70.9% of the secure key rate. With tolerated quantum bit error rate set to 8%, the suggested quantum communication azimuth angle between the aircraft and the ground station is within 55∘. Furthermore, the optimal beacon laser module and adaptive optics module are suggested to be employed, to improve the performance of airborne QKD system. Our detailed airborne QKD performance evaluation study can be performed to the future airborne quantum communication designs.