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Telecom-heralded entanglement between multimode solid-state quantum memories

Author

Listed:
  • Dario Lago-Rivera

    (The Barcelona Institute of Science and Technology)

  • Samuele Grandi

    (The Barcelona Institute of Science and Technology)

  • Jelena V. Rakonjac

    (The Barcelona Institute of Science and Technology)

  • Alessandro Seri

    (The Barcelona Institute of Science and Technology)

  • Hugues de Riedmatten

    (The Barcelona Institute of Science and Technology
    ICREA – Institució Catalana de Recerca i Estudis Avançats)

Abstract

Future quantum networks will enable the distribution of entanglement between distant locations and allow applications in quantum communication, quantum sensing and distributed quantum computation1. At the core of this network lies the ability to generate and store entanglement at remote, interconnected quantum nodes2. Although various remote physical systems have been successfully entangled3–12, none of these realizations encompassed all of the requirements for network operation, such as compatibility with telecommunication (telecom) wavelengths and multimode operation. Here we report the demonstration of heralded entanglement between two spatially separated quantum nodes, where the entanglement is stored in multimode solid-state quantum memories. At each node a praseodymium-doped crystal13,14 stores a photon of a correlated pair15, with the second photon at telecom wavelengths. Entanglement between quantum memories placed in different laboratories is heralded by the detection of a telecom photon at a rate up to 1.4 kilohertz, and the entanglement is stored in the crystals for a pre-determined storage time up to 25 microseconds. We also show that the generated entanglement is robust against loss in the heralding path, and demonstrate temporally multiplexed operation, with 62 temporal modes. Our realization is extendable to entanglement over longer distances and provides a viable route towards field-deployed, multiplexed quantum repeaters based on solid-state resources.

Suggested Citation

  • Dario Lago-Rivera & Samuele Grandi & Jelena V. Rakonjac & Alessandro Seri & Hugues de Riedmatten, 2021. "Telecom-heralded entanglement between multimode solid-state quantum memories," Nature, Nature, vol. 594(7861), pages 37-40, June.
    • Handle: RePEc:nat:nature:v:594:y:2021:i:7861:d:10.1038_s41586-021-03481-8
    DOI: 10.1038/s41586-021-03481-8
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    Cited by:

    1. Dario Lago-Rivera & Jelena V. Rakonjac & Samuele Grandi & Hugues de Riedmatten, 2023. "Long distance multiplexed quantum teleportation from a telecom photon to a solid-state qubit," Nature Communications, Nature, vol. 14(1), pages 1-6, December.
    2. M. Businger & L. Nicolas & T. Sanchez Mejia & A. Ferrier & P. Goldner & Mikael Afzelius, 2022. "Non-classical correlations over 1250 modes between telecom photons and 979-nm photons stored in 171Yb3+:Y2SiO5," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    3. Jake Rochman & Tian Xie & John G. Bartholomew & K. C. Schwab & Andrei Faraon, 2023. "Microwave-to-optical transduction with erbium ions coupled to planar photonic and superconducting resonators," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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