Multiuser Time-Energy Entanglement Swapping Based on Dense Wavelength Division Multiplexed and Sum-Frequency Generation

Yuanhua Li, Yiwen Huang, Tong Xiang, Yiyou Nie, Minghuang Sang, Luqi Yuan, and Xianfeng Chen
Phys. Rev. Lett. 123, 250505 – Published 20 December 2019
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Abstract

Perfect entanglement swapping, which can be realized without the postselection by using the nonlinear optical technology, provides an important way toward generating the large-scale quantum network. We explore an entanglement-swapping-based dense wavelength division multiplexed network in the experiment. Four users receive single quantum states at different wavelengths, and we perform a time-energy entanglement swapping operation based on the sum-frequency generation to make users fully connected in the network. The results show that the fidelity of the entangled state is larger than 90% and is independent of the number of users. Our Letter demonstrates the feasibility of a proposed multiuser network, and hence paves a route toward a variety of quantum applications, including entanglement-swapping-based quantum direct communication.

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  • Received 28 June 2019

DOI:https://doi.org/10.1103/PhysRevLett.123.250505

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & OpticalQuantum Information, Science & Technology

Authors & Affiliations

Yuanhua Li1,2, Yiwen Huang1, Tong Xiang1, Yiyou Nie2, Minghuang Sang2, Luqi Yuan1, and Xianfeng Chen1,*

  • 1State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
  • 2Department of Physics, Jiangxi Normal University, Nanchang 330022, China

  • *xfchen@sjtu.edu.cn

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Vol. 123, Iss. 25 — 20 December 2019

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