Towards satellite-based quantum-secure time transfer
- URL: http://arxiv.org/abs/2006.00666v1
- Date: Mon, 1 Jun 2020 01:50:18 GMT
- Title: Towards satellite-based quantum-secure time transfer
- Authors: 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
- Abstract summary: We propose a satellite-based quantum-secure time transfer (QSTT) scheme based on two-way quantum key distribution (QKD) in free-space.
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
- Score: 6.971780549888377
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: 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.
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