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

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.

arXiv comment5 pages

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• Coherent Control of Fano Resonances in a Macroscopic Four-Mirror Cavity
• Electrode configuration and electrical dissipation of mechanical energy in quartz crystal resonators
• Optimal Form Factors for Experimental Proposals on Gravity-Induced Entanglement
• Cavity Optomechanical Probe of Gravity Between Massive Mechanical Oscillators
• High precision displacement sensing of monolithic piezoelectric disk resonators using a single-electron transistor
• Impact of the Central Frequency of Environment on Non-Markovian Dynamics in Piezoelectric Optomechanical Devices
• Single-photon quantum regime of artificial radiation pressure on a surface acoustic wave resonator