Details

Autor(en) / Beteiligte

• Yin, Juan
• Cao, Yuan
• Li, Yu-Huai
• Liao, Sheng-Kai
• Zhang, Liang
• Ren, Ji-Gang
• Cai, Wen-Qi
• Liu, Wei-Yue
• Li, Bo
• Dai, Hui
• Li, Guang-Bing
• Lu, Qi-Ming
• Gong, Yun-Hong
• Xu, Yu
• Li, Shuang-Lin
• Li, Feng-Zhi
• Yin, Ya-Yun
• Jiang, Zi-Qing
• Li, Ming
• Jia, Jian-Jun
• Ren, Ge
• He, Dong
• Zhou, Yi-Lin
• Zhang, Xiao-Xiang
• Wang, Na
• Chang, Xiang
• Zhu, Zhen-Cai
• Liu, Nai-Le
• Chen, Yu-Ao
• Lu, Chao-Yang
• Shu, Rong
• Peng, Cheng-Zhi
• Wang, Jian-Yu
• Pan, Jian-Wei

Titel

Satellite-based entanglement distribution over 1200 kilometers

Ist Teil von

• Science (American Association for the Advancement of Science), 2017-06, Vol.356 (6343), p.1140-1144

Ort / Verlag

United States: American Association for the Advancement of Science

Erscheinungsjahr

2017

Quelle

American Association for the Advancement of Science

Beschreibungen/Notizen

• Long-distance entanglement distribution is essential for both foundational tests of quantum physics and scalable quantum networks. Owing to channel loss, however, the previously achieved distance was limited to ~100 kilometers. Here we demonstrate satellite-based distribution of entangled photon pairs to two locations separated by 1203 kilometers on Earth, through two satellite-to-ground downlinks with a summed length varying from 1600 to 2400 kilometers. We observed a survival of two-photon entanglement and a violation of Bell inequality by 2.37 ± 0.09 under strict Einstein locality conditions. The obtained effective link efficiency is orders of magnitude higher than that of the direct bidirectional transmission of the two photons through telecommunication fibers.