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Remote quantum entanglement between two micromechanical oscillators

Author

Listed:
  • Ralf Riedinger

    (University of Vienna)

  • Andreas Wallucks

    (Delft University of Technology)

  • Igor Marinković

    (Delft University of Technology)

  • Clemens Löschnauer

    (University of Vienna)

  • Markus Aspelmeyer

    (University of Vienna)

  • Sungkun Hong

    (University of Vienna)

  • Simon Gröblacher

    (Delft University of Technology)

Abstract

Entanglement, an essential feature of quantum theory that allows for inseparable quantum correlations to be shared between distant parties, is a crucial resource for quantum networks1. Of particular importance is the ability to distribute entanglement between remote objects that can also serve as quantum memories. This has been previously realized using systems such as warm2,3 and cold atomic vapours4,5, individual atoms6 and ions7,8, and defects in solid-state systems9–11. Practical communication applications require a combination of several advantageous features, such as a particular operating wavelength, high bandwidth and long memory lifetimes. Here we introduce a purely micromachined solid-state platform in the form of chip-based optomechanical resonators made of nanostructured silicon beams. We create and demonstrate entanglement between two micromechanical oscillators across two chips that are separated by 20 centimetres . The entangled quantum state is distributed by an optical field at a designed wavelength near 1,550 nanometres. Therefore, our system can be directly incorporated in a realistic fibre-optic quantum network operating in the conventional optical telecommunication band. Our results are an important step towards the development of large-area quantum networks based on silicon photonics.

Suggested Citation

  • Ralf Riedinger & Andreas Wallucks & Igor Marinković & Clemens Löschnauer & Markus Aspelmeyer & Sungkun Hong & Simon Gröblacher, 2018. "Remote quantum entanglement between two micromechanical oscillators," Nature, Nature, vol. 556(7702), pages 473-477, April.
    • Handle: RePEc:nat:nature:v:556:y:2018:i:7702:d:10.1038_s41586-018-0036-z
    DOI: 10.1038/s41586-018-0036-z
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    Cited by:

    1. Juliane Doster & Tirth Shah & Thomas Fösel & Philipp Paulitschke & Florian Marquardt & Eva M. Weig, 2022. "Observing polarization patterns in the collective motion of nanomechanical arrays," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    2. Simon Hönl & Youri Popoff & Daniele Caimi & Alberto Beccari & Tobias J. Kippenberg & Paul Seidler, 2022. "Microwave-to-optical conversion with a gallium phosphide photonic crystal cavity," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    3. Roel Burgwal & Ewold Verhagen, 2023. "Enhanced nonlinear optomechanics in a coupled-mode photonic crystal device," Nature Communications, Nature, vol. 14(1), pages 1-12, December.
    4. Jingkun Guo & Jin Chang & Xiong Yao & Simon Gröblacher, 2023. "Active-feedback quantum control of an integrated low-frequency mechanical resonator," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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