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arXiv 2006.00666quant-phphysics.optics
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基于卫星的量子保密时间传递

Towards satellite-based quantum-secure time transfer

Hui Dai, Qi Shen, Chao-Ze Wang, Shuang-Lin Li, Wei-Yue Liu, Wen-Qi Cai, Sheng-Kai Liao, Ji-Gang Ren, Juan Yin, Yu-Ao Chen, Qiang Zhang, Feihu Xu, Cheng-Zhi Peng, Jian-Wei Pan

摘要:

远程时钟的高精度时间同步在基础科学和实际应用中起着重要的作用。然而,目前的时间同步技术已被证明是脆弱的复杂的对手。迫切需要一种全新的方法来安全地分发高精度的时间信息。提出了一种基于自由空间双向量子密钥分发(QKD)的星载量子安全时间传输(QSTT)方案,并通过Micius量子卫星对该方案的关键技术进行了实验验证。在QSTT中,量子信号(例如,单光子)被用作时间传递和密钥生成的载体,为时间信号和时间信息的传递提供量子增强的安全性。利用单光子信号实现了星地时间同步,量子误码率小于1%,时间数据率为9 kHz,时间传递精度为30 ps。这些结果为增强时间传输网络的基础设施提供了可能性,其安全性源于量子物理学。

英文摘要:

High-precision time synchronization for remote clocks plays an important role in fundamental science and real-life applications. However, the current time synchronization techniques have been shown to be vulnerable to sophisticated adversaries. There is a compelling need for fundamentally new methods to distribute high-precision time information securely. Here we propose a satellite-based quantum-secure time transfer (QSTT) scheme based on two-way quantum key distribution (QKD) in free-space, and experimentally verify the key technologies of the scheme via the Micius quantum satellite. In QSTT, a quantum signal (e.g., single photon) is used as the carrier for both the time transfer and the secret-key generation, offering quantum-enhanced security for transferring time signal and time information. We perform a satellite-to-ground time synchronization using single-photon-level signals and achieve a quantum bit error rate of less than 1%, a time data rate of 9 kHz and a time-transfer precision of 30 ps. These results offer possibilities towards an enhanced infrastructure of time-transfer network, whose security stems from quantum physics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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