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arXiv · 1609.08469

Optomechanical measurement of a millimeter-sized mechanical oscillator near the quantum limit

J. T. Santos·J. Li·J. Ilves·C. F. Ockeloen-Korppi·M. A. Sillanpaa
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Abstract

Cavity optomechanics is a tool to study the interaction between light and micromechanical motion. Here we observe near-quantum limited optomechanical physics in a truly macroscopic oscillator. As the mechanical system, we use a mm-sized piezoelectric quartz disk oscillator. Its motion is coupled to a charge qubit which translates the piezo-induced charge into an effective radiation-pressure interaction between the disk and a microwave cavity. We measure the thermal motion of the lowest mechanical shear mode at 7MHz down to 35 mK, corresponding to roughly 100 quanta in a 20mg oscillator. The work opens up opportunities for macroscopic quantum experiments.

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J. T. Santos, J. Li, J. Ilves, C. F. Ockeloen-Korppi, M. A. Sillanpaa. 2016-09-27. Optomechanical measurement of a millimeter-sized mechanical oscillator near the quantum limit. https://doi.org/10.1088/1367-2630%2Faa83a5

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