Experimental demonstration of memory-enhanced scaling for entanglement connection of quantum repeater segments

• URL: http://arxiv.org/abs/2101.08541v3
• Date: Fri, 28 Jan 2022 07:46:15 GMT
• Title: Experimental demonstration of memory-enhanced scaling for entanglement connection of quantum repeater segments
• Authors: Yunfei Pu, Sheng Zhang, Yukai Wu, Nan Jiang, Wei Chang, Chang Li and Luming Duan
• Abstract summary: The quantum repeater protocol is a promising approach to implement long-distance quantum communication and large-scale quantum networks. Here we report an experiment which realizes efficient connection of two quantum repeater segments via on-demand entanglement swapping. The experimental realization of entanglement connection of two quantum repeater segments with an efficient memory-enhanced scaling demonstrates a key advantage of the quantum repeater protocol.
• Score: 13.78819436405072
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The quantum repeater protocol is a promising approach to implement long-distance quantum communication and large-scale quantum networks. A key idea of the quantum repeater protocol is to use long-lived quantum memories to achieve efficient entanglement connection between different repeater segments with a polynomial scaling. Here we report an experiment which realizes efficient connection of two quantum repeater segments via on-demand entanglement swapping by the use of two atomic quantum memories with storage time of tens of milliseconds. With the memory enhancement, scaling-changing acceleration is demonstrated in the rate for a successful entanglement connection. The experimental realization of entanglement connection of two quantum repeater segments with an efficient memory-enhanced scaling demonstrates a key advantage of the quantum repeater protocol, which makes a cornerstone towards future large-scale quantum networks.

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