Jian-Yu Wang, Bin Yang, Sheng-Kai Liao, Liang Zhang, Qi Shen, Xiao-Fang Hu, Jin-Cai Wu, Shi-Ji Yang, Yan-Lin Tang, Bo Zhong, Hao Liang, Wei-Yue Liu, Yi-Hua Hu, Yong-Mei Huang, Ji-Gang Ren, Ge-Sheng Pan, Juan Yin, Jian-Jun Jia, Kai Chen, Chen-Zhi Peng, Jian-Wei Pan
Quantum key distribution (QKD), provides the only intrinsically unconditional secure method based on principle of quantum mechanics. Compared with fiber-based demonstrations, free-space links could provide the most appealing solution for much larger distance. Despite of significant efforts, so far all realizations rely on stationary sites. Justifications are therefore extremely crucial for applications via a typical Low Earth Orbit Satellite (LEOS). To achieve direct and full-scale verifications, we report here three independent experiments for a decoy-state QKD system allowing overcoming all the demanding conditions. The system is operated in a moving platform through a turntable, a floating platform through a hot-air balloon, and a huge loss channel, respectively, for substantiating performances under rapid motion, vibration, random movement of satellites and in high-loss regime. The experiments cover expanded ranges for all the leading parameters of LEOS. Our results pave the way for implementation towards ground-satellite QKD and promising global quantum communication network.
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http://arxiv.org/abs/1210.7556
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