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Deterministic delivery of remote entanglement on a quantum network

Author

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  • Peter C. Humphreys

    (QuTech and Kavli Institute of Nanoscience, Delft University of Technology)

  • Norbert Kalb

    (QuTech and Kavli Institute of Nanoscience, Delft University of Technology)

  • Jaco P. J. Morits

    (QuTech and Kavli Institute of Nanoscience, Delft University of Technology)

  • Raymond N. Schouten

    (QuTech and Kavli Institute of Nanoscience, Delft University of Technology)

  • Raymond F. L. Vermeulen

    (QuTech and Kavli Institute of Nanoscience, Delft University of Technology)

  • Daniel J. Twitchen

    (Element Six Innovation)

  • Matthew Markham

    (Element Six Innovation)

  • Ronald Hanson

    (QuTech and Kavli Institute of Nanoscience, Delft University of Technology)

Abstract

Large-scale quantum networks promise to enable secure communication, distributed quantum computing, enhanced sensing and fundamental tests of quantum mechanics through the distribution of entanglement across nodes1–7. Moving beyond current two-node networks8–13 requires the rate of entanglement generation between nodes to exceed the decoherence (loss) rate of the entanglement. If this criterion is met, intrinsically probabilistic entangling protocols can be used to provide deterministic remote entanglement at pre-specified times. Here we demonstrate this using diamond spin qubit nodes separated by two metres. We realize a fully heralded single-photon entanglement protocol that achieves entangling rates of up to 39 hertz, three orders of magnitude higher than previously demonstrated two-photon protocols on this platform 14 . At the same time, we suppress the decoherence rate of remote-entangled states to five hertz through dynamical decoupling. By combining these results with efficient charge-state control and mitigation of spectral diffusion, we deterministically deliver a fresh remote state with an average entanglement fidelity of more than 0.5 at every clock cycle of about 100 milliseconds without any pre- or post-selection. These results demonstrate a key building block for extended quantum networks and open the door to entanglement distribution across multiple remote nodes.

Suggested Citation

  • Peter C. Humphreys & Norbert Kalb & Jaco P. J. Morits & Raymond N. Schouten & Raymond F. L. Vermeulen & Daniel J. Twitchen & Matthew Markham & Ronald Hanson, 2018. "Deterministic delivery of remote entanglement on a quantum network," Nature, Nature, vol. 558(7709), pages 268-273, June.
  • Handle: RePEc:nat:nature:v:558:y:2018:i:7709:d:10.1038_s41586-018-0200-5
    DOI: 10.1038/s41586-018-0200-5
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    Cited by:

    1. Pasquale Cilibrizzi & Muhammad Junaid Arshad & Benedikt Tissot & Nguyen Tien Son & Ivan G. Ivanov & Thomas Astner & Philipp Koller & Misagh Ghezellou & Jawad Ul-Hassan & Daniel White & Christiaan Bekk, 2023. "Ultra-narrow inhomogeneous spectral distribution of telecom-wavelength vanadium centres in isotopically-enriched silicon carbide," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    2. Hanfeng Wang & Matthew E. Trusheim & Laura Kim & Hamza Raniwala & Dirk R. Englund, 2023. "Field programmable spin arrays for scalable quantum repeaters," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Yeonghun Lee & Yaoqiao Hu & Xiuyao Lang & Dongwook Kim & Kejun Li & Yuan Ping & Kai-Mei C. Fu & Kyeongjae Cho, 2022. "Spin-defect qubits in two-dimensional transition metal dichalcogenides operating at telecom wavelengths," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    4. Mario E Rivero-Angeles, 2021. "Quantum-based wireless sensor networks: A review and open questions," International Journal of Distributed Sensor Networks, , vol. 17(10), pages 15501477211, October.
    5. Sunihl Ma & Young-Kwang Jung & Jihoon Ahn & Jihoon Kyhm & Jeiwan Tan & Hyungsoo Lee & Gyumin Jang & Chan Uk Lee & Aron Walsh & Jooho Moon, 2022. "Elucidating the origin of chiroptical activity in chiral 2D perovskites through nano-confined growth," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

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