Satellite-based entanglement distribution over 1200 kilometers
University of Science and Technology of China · Chinese Academy of Sciences · +7 more institutions
Abstract
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…
Citation impact
- FWCI
- 110.92
- Percentile
- 100%
- References
- 36
Authors
34- JYJuan Yin
University of Science and Technology of China, Chinese Academy of Sciences, Hefei National Center for Physical Sciences at Nanoscale
- YCYuan Cao
University of Science and Technology of China, Chinese Academy of Sciences, Hefei National Center for Physical Sciences at Nanoscale
- YLYu-Huai Li
University of Science and Technology of China, Chinese Academy of Sciences, Hefei National Center for Physical Sciences at Nanoscale
- SLSheng‐Kai Liao
University of Science and Technology of China, Chinese Academy of Sciences, Hefei National Center for Physical Sciences at Nanoscale
- LZLiang Zhang
University of Science and Technology of China, Chinese Academy of Sciences, Shanghai Institute of Technical Physics
Topics & keywords
- Satellite
- Quantum entanglement
- Photon entanglement
- Remote sensing
- Photon
- Distribution (mathematics)
- Environmental science
- Physics
- Climate action