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Multimode circuit optomechanics near the quantum limit

Author

Listed:
  • Francesco Massel

    (Low Temperature Laboratory, Aalto University School of Science)

  • Sung Un Cho

    (Low Temperature Laboratory, Aalto University School of Science
    Present address: Korea Research Institute of Standards and Science, Daejeon 305-340, Republic of Korea)

  • Juha-Matti Pirkkalainen

    (Low Temperature Laboratory, Aalto University School of Science)

  • Pertti J. Hakonen

    (Low Temperature Laboratory, Aalto University School of Science)

  • Tero T. Heikkilä

    (Low Temperature Laboratory, Aalto University School of Science)

  • Mika A. Sillanpää

    (Low Temperature Laboratory, Aalto University School of Science
    Present address: Department of Applied Physics, Aalto University School of Science, P.O. Box 11100, FI-00076 Aalto, Finland)

Abstract

The coupling of distinct systems underlies nearly all physical phenomena. A basic instance is that of interacting harmonic oscillators, giving rise to, for example, the phonon eigenmodes in a lattice. Of particular importance are the interactions in hybrid quantum systems, which can combine the benefits of each part in quantum technologies. Here we investigate a hybrid optomechanical system having three degrees of freedom, consisting of a microwave cavity and two micromechanical beams with closely spaced frequencies around 32 MHz and no direct interaction. We record the first evidence of tripartite optomechanical mixing, implying that the eigenmodes are combinations of one photonic and two phononic modes. We identify an asymmetric dark mode having a long lifetime. Simultaneously, we operate the nearly macroscopic mechanical modes close to the motional quantum ground state, down to 1.8 thermal quanta, achieved by back-action cooling. These results constitute an important advance towards engineering of entangled motional states.

Suggested Citation

  • Francesco Massel & Sung Un Cho & Juha-Matti Pirkkalainen & Pertti J. Hakonen & Tero T. Heikkilä & Mika A. Sillanpää, 2012. "Multimode circuit optomechanics near the quantum limit," Nature Communications, Nature, vol. 3(1), pages 1-6, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1993
    DOI: 10.1038/ncomms1993
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    Cited by:

    1. Hengjiang Ren & Tirth Shah & Hannes Pfeifer & Christian Brendel & Vittorio Peano & Florian Marquardt & Oskar Painter, 2022. "Topological phonon transport in an optomechanical system," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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