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Certification of non-classicality in all links of a photonic star network without assuming quantum mechanics

Author

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  • Ning-Ning Wang

    (University of Science and Technology of China
    University of Science and Technology of China
    University of Science and Technology of China)

  • Alejandro Pozas-Kerstjens

    (Institute for Mathematical Sciences—ICMAT (CSIC-UAM-UC3M-UCM))

  • Chao Zhang

    (University of Science and Technology of China
    University of Science and Technology of China
    University of Science and Technology of China)

  • Bi-Heng Liu

    (University of Science and Technology of China
    University of Science and Technology of China
    University of Science and Technology of China)

  • Yun-Feng Huang

    (University of Science and Technology of China
    University of Science and Technology of China
    University of Science and Technology of China)

  • Chuan-Feng Li

    (University of Science and Technology of China
    University of Science and Technology of China
    University of Science and Technology of China)

  • Guang-Can Guo

    (University of Science and Technology of China
    University of Science and Technology of China
    University of Science and Technology of China)

  • Nicolas Gisin

    (University of Geneva
    Constructor University)

  • Armin Tavakoli

    (Lund University
    Institute for Quantum Optics and Quantum Information—IQOQI Vienna Austrian Academy of Sciences)

Abstract

Networks composed of independent sources of entangled particles that connect distant users are a rapidly developing quantum technology and an increasingly promising test-bed for fundamental physics. Here we address the certification of their post-classical properties through demonstrations of full network nonlocality. Full network nonlocality goes beyond standard nonlocality in networks by falsifying any model in which at least one source is classical, even if all the other sources are limited only by the no-signaling principle. We report on the observation of full network nonlocality in a star-shaped network featuring three independent sources of photonic qubits and joint three-qubit entanglement-swapping measurements. Our results demonstrate that experimental observation of full network nonlocality beyond the bilocal scenario is possible with current technology.

Suggested Citation

  • Ning-Ning Wang & Alejandro Pozas-Kerstjens & Chao Zhang & Bi-Heng Liu & Yun-Feng Huang & Chuan-Feng Li & Guang-Can Guo & Nicolas Gisin & Armin Tavakoli, 2023. "Certification of non-classicality in all links of a photonic star network without assuming quantum mechanics," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-37842-w
    DOI: 10.1038/s41467-023-37842-w
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    References listed on IDEAS

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