Quantum key distribution over scattering channel
- URL: http://arxiv.org/abs/2109.12282v2
- Date: Tue, 28 Sep 2021 03:42:51 GMT
- Title: Quantum key distribution over scattering channel
- Authors: Qi-Hang Lu, Fang-Xiang Wang, Kun Huang, Xin Wu, Shuang Wang, De-Yong
He, Zhen-Qiang Yin, Guang-Can Guo, Wei Chen, Zheng-Fu Han
- Abstract summary: We employ the wavefront shaping technology to compensate distorted optical signals in high-loss scattering quantum channels.
We achieve a typical enhancement of about 250 in transmission efficiency and improve the secure key rate from 0 to $1.85times10-6$ per sifted key.
- Score: 14.337214570878176
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Scattering of light by cloud, haze, and fog decreases the transmission
efficiency of communication channels in quantum key distribution (QKD), reduces
the system's practical security, and thus constrains the deployment of
free-space QKD. Here, we employ the wavefront shaping technology to compensate
distorted optical signals in high-loss scattering quantum channels and fulfill
a polarization-encoded BB84 QKD experiment. With this quantum channel
compensation technology, we achieve a typical enhancement of about 250 in
transmission efficiency and improve the secure key rate from 0 to
$1.85\times10^{-6}$ per sifted key. The method and its first time validation
show the great potential to expand the territory of QKD systems from lossless
channels to highly scattered ones and therefore enhances the deployment ability
of global quantum communication network.
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