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Measurement-based quantum control of mechanical motion

Author

Listed:
  • Massimiliano Rossi

    (Niels Bohr Institute, University of Copenhagen
    Center for Hybrid Quantum Networks (Hy-Q), Niels Bohr Institute, University of Copenhagen)

  • David Mason

    (Niels Bohr Institute, University of Copenhagen
    Center for Hybrid Quantum Networks (Hy-Q), Niels Bohr Institute, University of Copenhagen)

  • Junxin Chen

    (Niels Bohr Institute, University of Copenhagen
    Center for Hybrid Quantum Networks (Hy-Q), Niels Bohr Institute, University of Copenhagen)

  • Yeghishe Tsaturyan

    (Niels Bohr Institute, University of Copenhagen)

  • Albert Schliesser

    (Niels Bohr Institute, University of Copenhagen
    Center for Hybrid Quantum Networks (Hy-Q), Niels Bohr Institute, University of Copenhagen)

Abstract

Controlling a quantum system by using observations of its dynamics is complicated by the backaction of the measurement process—that is, the unavoidable quantum disturbance caused by coupling the system to a measurement apparatus. An efficient measurement is one that maximizes the amount of information gained per disturbance incurred. Real-time feedback can then be used to cancel the backaction of the measurement and to control the evolution of the quantum state. Such measurement-based quantum control has been demonstrated in the clean settings of cavity and circuit quantum electrodynamics, but its application to motional degrees of freedom has remained elusive. Here we demonstrate measurement-based quantum control of the motion of a millimetre-sized membrane resonator. An optomechanical transducer resolves the zero-point motion of the resonator in a fraction of its millisecond-scale coherence time, with an overall measurement efficiency close to unity. An electronic feedback loop converts this position record to a force that cools the resonator mode to its quantum ground state (residual thermal occupation of about 0.29). This occupation is nine decibels below the quantum-backaction limit of sideband cooling and six orders of magnitude below the equilibrium occupation of the thermal environment. We thus realize a long-standing goal in the field, adding position and momentum to the degrees of freedom that are amenable to measurement-based quantum control, with potential applications in quantum information processing and gravitational-wave detectors.

Suggested Citation

  • Massimiliano Rossi & David Mason & Junxin Chen & Yeghishe Tsaturyan & Albert Schliesser, 2018. "Measurement-based quantum control of mechanical motion," Nature, Nature, vol. 563(7729), pages 53-58, November.
    • Handle: RePEc:nat:nature:v:563:y:2018:i:7729:d:10.1038_s41586-018-0643-8
    DOI: 10.1038/s41586-018-0643-8
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    Citations

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    Cited by:

    1. Stefano Stassi & Ido Cooperstein & Mauro Tortello & Candido Fabrizio Pirri & Shlomo Magdassi & Carlo Ricciardi, 2021. "Reaching silicon-based NEMS performances with 3D printed nanomechanical resonators," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    2. Fabrizio Berritta & Torbjørn Rasmussen & Jan A. Krzywda & Joost Heijden & Federico Fedele & Saeed Fallahi & Geoffrey C. Gardner & Michael J. Manfra & Evert Nieuwenburg & Jeroen Danon & Anasua Chatterj, 2024. "Real-time two-axis control of a spin qubit," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    3. Peipei Pan & Aixi Chen & Li Deng, 2023. "Improving Mechanical Oscillator Cooling in a Double-Coupled Cavity Optomechanical System with an Optical Parametric Amplifier," Mathematics, MDPI, vol. 11(9), pages 1-12, May.
    4. Christian Bærentsen & Sergey A. Fedorov & Christoffer Østfeldt & Mikhail V. Balabas & Emil Zeuthen & Eugene S. Polzik, 2024. "Squeezed light from an oscillator measured at the rate of oscillation," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    5. Yannick Seis & Thibault Capelle & Eric Langman & Sampo Saarinen & Eric Planz & Albert Schliesser, 2022. "Ground state cooling of an ultracoherent electromechanical system," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    6. 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.
    7. M. J. Bereyhi & A. Beccari & R. Groth & S. A. Fedorov & A. Arabmoheghi & T. J. Kippenberg & N. J. Engelsen, 2022. "Hierarchical tensile structures with ultralow mechanical dissipation," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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