Entanglement of three quantum memories via interference of three single photons View Full Text


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Article Info

DATE

2019-03

AUTHORS

Bo Jing, Xu-Jie Wang, Yong Yu, Peng-Fei Sun, Yan Jiang, Sheng-Jun Yang, Wen-Hao Jiang, Xi-Yu Luo, Jun Zhang, Xiao Jiang, Xiao-Hui Bao, Jian-Wei Pan

ABSTRACT

Quantum memory networks as an intermediate stage in the development of a quantum internet1 will enable a number of significant applications2-5. To connect and entangle remote quantum memories, it is best to use photons. In previous experiments6-13, entanglement of two memory nodes has been achieved via photon interference. Going beyond the state of the art by entangling many quantum nodes at a distance is highly sought after. Here, we report the entanglement of three remote quantum memories via three-photon interference. We employ laser-cooled atomic ensembles and make use of a ring cavity to enhance the overall efficiency of our memory–photon entanglement. By interfering three single photons from three separate set-ups, we create entanglement of three memories and three photons. Then, by measuring the photons and applying feed-forward, we achieve heralded entanglement between the three memories. Our experiment may be employed as a building block to construct larger and complex quantum networks14,15. The entanglement of three remote quantum memories based on 87Rb atoms is created via three-photon interference by enhancing the memory–photon entanglement in ring cavities, demonstrating a genuine quantum network involving more than two quantum nodes. More... »

PAGES

210-213

Identifiers

URI

http://scigraph.springernature.com/pub.10.1038/s41566-018-0342-x

DOI

http://dx.doi.org/10.1038/s41566-018-0342-x

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1111418056


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    "description": "Quantum memory networks as an intermediate stage in the development of a quantum internet1 will enable a number of significant applications2-5. To connect and entangle remote quantum memories, it is best to use photons. In previous experiments6-13, entanglement of two memory nodes has been achieved via photon interference. Going beyond the state of the art by entangling many quantum nodes at a distance is highly sought after. Here, we report the entanglement of three remote quantum memories via three-photon interference. We employ laser-cooled atomic ensembles and make use of a ring cavity to enhance the overall efficiency of our memory\u2013photon entanglement. By interfering three single photons from three separate set-ups, we create entanglement of three memories and three photons. Then, by measuring the photons and applying feed-forward, we achieve heralded entanglement between the three memories. Our experiment may be employed as a building block to construct larger and complex quantum networks14,15. The entanglement of three remote quantum memories based on 87Rb atoms is created via three-photon interference by enhancing the memory\u2013photon entanglement in ring cavities, demonstrating a genuine quantum network involving more than two quantum nodes.", 
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