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arXiv:1707.00934 · Nature

Ground-to-satellite quantum teleportation

Ji-Gang Ren, Ping Xu, Hai-Lin Yong, Liang Zhang, Sheng‐Kai Liao, Juan Yin, Wei-Yue Liu, Wenqi Cai, Meng Yang, Li Li, Kui-Xing Yang, Xuan Han, Yongqiang Yao, Ji Li, Wu Haiyan, Song Wan, Lei Liu, Dingquan Liu, Yaowu Kuang, Zhiping He, Peng Shang, Cheng Guo, Ru-Hua Zheng, Kai Tian, Zhencai Zhu, Nai-Le Liu, Chao‐Yang Lu, Rong Shu, Yu-Ao Chen, Cheng-Zhi Peng, Jianyu Wang, Jian-Wei Pan

Published Aug 7, 2017• 962 citations
arXivHTMLPDF
DOI
10.1038/nature23675

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Quantum information transfer via high-dimensional encoding offers many potential advantages relative to the widely adopted two-dimensional encoding scenario. In this work, we investigate the feasibility of performing satellite-to-ground quantum entanglement distribution using photonic high-dimensional encoding. Specifically, we consider pairs of photons entangled in the Orbital Angular Momentum (OAM) discrete-variable bases. Through detailed simulations of the anticipated satellite-to-ground channel, we first investigate the performance of OAM entanglement distribution of varying dimensions. We then consider an application of such OAM distributed entanglement, namely, high-dimensional OAM quantum teleportation. Our work outlines, for the first time, the range of channel conditions and system configurations under which high-dimensional quantum teleportation via OAM encoding in the satellite-to-ground channel is possible.
Abstract Advances in satellite quantum communications aim at reshaping the global telecommunication network by increasing the security of the transferred information. Here, we study the effects of atmospheric turbulence in continuous-variable entanglement distribution and quantum teleportation in the optical regime between a ground station and a satellite. More specifically, we study the degradation of entanglement due to various error sources in the distribution, namely, diffraction, atmospheric attenuation, turbulence, and detector inefficiency, in both downlink and uplink scenarios. As the fidelity of a quantum teleportation protocol using these distributed entangled resources is not sufficient, we include an intermediate station for either state generation, or beam refocusing, in order to reduce the effects of atmospheric turbulence and diffraction, respectively. The results show the feasibility of free-space entanglement distribution and quantum teleportation in downlink paths up to the LEO region, but also in uplink paths with the help of the intermediate station. Finally, we complete the study with microwave-optical comparison in bad weather situations, and with the study of horizontal paths in ground-to-ground and inter-satellite quantum communication.