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Feasibility of space-based measurement-device-independent quantum key distribution
New Journal of Physics ( IF 3.3 ) Pub Date : 2021-04-21 , DOI: 10.1088/1367-2630/abf534
Xingyu Wang 1, 2 , Chen Dong 1 , Shanghong Zhao 2 , Yong Liu 1 , Xiaowen Liu 1 , Haonan Zhu 2
Affiliation  

The measurement-device-independent (MDI) quantum key distribution (QKD) is considered to be an alternative to overcome the currently trusted satellite paradigm. However, the feasibility of the space-based MDI-QKD remains unclear in terms of the factors: the high-loss uplink between a ground station and a satellite, the limited duration when two ground stations are simultaneously visible, as well as the rigorous requirements for the two-photon interference when performing the Bell-state measurement. In this paper, we present a feasibility assessment of space-based MDI-QKD based on the Micius satellite. Integrated with the orbital dynamics model and atmosphere channel model, a framework is presented to explore the whole parameters space including orbit height, elevation angle, apertures of transceiver and atmospheric turbulence intensity to give the considerations for improving key rates and subsequently provide a relevant parameter tradeoff for the implementation of space-based MDI-QKD. We further investigate the heart of MDI-QKD, the two-photon interference considerations such as the frequency calibration and time synchronization technology against Doppler shift, and the way of performing the intensity optimization method in the dynamic and asymmetric channels. Our work can be used as a pathfinder to support decisions involving as the selection of the future quantum communication satellite missions.



中文翻译:

天基测量设备独立量子密钥分发的可行性

独立于测量设备 (MDI) 的量子密钥分发 (QKD) 被认为是克服当前受信任卫星范式的替代方案。然而,天基MDI-QKD的可行性尚不明确,主要有地面站和卫星之间的高损耗上行链路,两个地面站同时可见的时间有限,以及严格的要求。用于进行贝尔态测量时的双光子干涉。在本文中,我们提出了基于墨子卫星的天基 MDI-QKD 的可行性评估。结合轨道动力学模型和大气通道模型,提出了一个框架来探索包括轨道高度、仰角、收发器的孔径和大气湍流强度,以考虑提高关键速率,并随后为天基 MDI-QKD 的实施提供相关参数权衡。我们进一步研究了 MDI-QKD 的核心,双光子干扰考虑因素,例如针对多普勒频移的频率校准和时间同步技术,以及在动态和非对称信道中执行强度优化方法的方式。我们的工作可以用作探路者,以支持涉及未来量子通信卫星任务选择的决策。双光子干扰的考虑,例如针对多普勒频移的频率校准和时间同步技术,以及在动态和非对称信道中执行强度优化方法的方式。我们的工作可以用作探路者,以支持涉及未来量子通信卫星任务选择的决策。双光子干扰的考虑,例如针对多普勒频移的频率校准和时间同步技术,以及在动态和非对称信道中执行强度优化方法的方式。我们的工作可以用作探路者,以支持涉及未来量子通信卫星任务选择的决策。

更新日期:2021-04-21
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