Experimental realization of entanglement in multiple degrees of freedom between two quantum memories

Wei Zhang, Dong-Sheng Ding (), Ming-Xin Dong, Shuai Shi, Kai Wang, Shi-Long Liu, Yan Li, Zhi-Yuan Zhou, Bao-Sen Shi () and Guang-Can Guo
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Wei Zhang: Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
Dong-Sheng Ding: Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
Ming-Xin Dong: Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
Shuai Shi: Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
Kai Wang: Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
Shi-Long Liu: Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
Yan Li: Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
Zhi-Yuan Zhou: Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
Bao-Sen Shi: Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
Guang-Can Guo: Key Laboratory of Quantum Information, CAS, University of Science and Technology of China

Nature Communications, 2016, vol. 7, issue 1, 1-7

Abstract: Abstract Entanglement in multiple degrees of freedom has many benefits over entanglement in a single one. The former enables quantum communication with higher channel capacity and more efficient quantum information processing and is compatible with diverse quantum networks. Establishing multi-degree-of-freedom entangled memories is not only vital for high-capacity quantum communication and computing, but also promising for enhanced violations of nonlocality in quantum systems. However, there have been yet no reports of the experimental realization of multi-degree-of-freedom entangled memories. Here we experimentally established hyper- and hybrid entanglement in multiple degrees of freedom, including path (K-vector) and orbital angular momentum, between two separated atomic ensembles by using quantum storage. The results are promising for achieving quantum communication and computing with many degrees of freedom.

Date: 2016
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DOI: 10.1038/ncomms13514

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