High-dimensional entanglement between distant atomic-ensemble memories

Light, Science & Applications
Dong-Sheng DingGuang-Can Guo

Abstract

Entangled quantum states in high-dimensional space show many advantages compared with entangled states in two-dimensional space. The former enable quantum communication with higher channel capacity, enable more efficient quantum-information processing and are more feasible for closing the detection loophole in Bell test experiments. Establishing high-dimensional entangled memories is essential for long-distance communication, but its experimental realization is lacking. We experimentally established high-dimensional entanglement in orbital angular momentum space between two atomic ensembles separated by 1 m. We reconstructed the density matrix for a three-dimensional entanglement and obtained an entanglement fidelity of (83.9±2.9)%. More importantly, we confirmed the successful preparation of a state entangled in more than three-dimensional space (up to seven-dimensional) using entanglement witnesses. Achieving high-dimensional entanglement represents a significant step toward a high-capacity quantum network.

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Sep 1, 2015·Physical Review Letters·Zong-Quan ZhouGuang-Can Guo
Nov 19, 2015·Proceedings of the National Academy of Sciences of the United States of America·Mario KrennAnton Zeilinger

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Citations

Mar 7, 2019·Light, Science & Applications·Manuel ErhardAnton Zeilinger
Jan 13, 2018·Optics Letters·Fang-Xiang WangZheng-Fu Han
Mar 23, 2017·Scientific Reports·Dong JiangLijun Chen
Feb 12, 2020·Science Advances·Jun LiuAndrew Forbes
May 15, 2020·Optics Express·Shuai ShiBao-Sen Shi
Mar 16, 2017·Optics Letters·Zhaoyang ZhangYanpeng Zhang
Jan 11, 2017·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Mario KrennAnton Zeilinger
May 15, 2020·Optics Express·Xinzhong Li, Hao Zhang

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Software Mentioned

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