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arXiv · 2008.07940

Mechanical dissipation below 1$\mu$Hz with a cryogenic diamagnetic-levitated micro-oscillator

Yingchun Leng·Rui Li·Xi Kong·Han Xie·Di Zheng·Peiran Yin·Fang Xiong·Tong Wu·Chang Kui Duan·Youwei Du·Zhang qi Yin·Pu Huang·Jiangfeng Du
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Abstract

Ultralow dissipation plays an important role in sensing applications and exploring macroscopic quantum phenomena using micro-and nano-mechanical systems. We report a diamagnetic-levitated micro-mechanical oscillator operating at a low temperature of 3K with measured dissipation as low as 0.59 $\mu$Hz and a quality factor as high as $2 \times 10^7$. To the best of our knowledge the achieved dissipation is the lowest in micro- and nano-mechanical systems to date, orders of magnitude improvement over the reported state-of-the-art systems based on different principles. The cryogenic diamagnetic-levitated oscillator described here is applicable to a wide range of mass, making it a good candidate for measuring both force and acceleration with ultra-high sensitivity. By virtue of the naturally existing strong magnetic gradient, this system has great potential in quantum spin mechanics study.

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Yingchun Leng, Rui Li, Xi Kong, Han Xie, Di Zheng, Peiran Yin, Fang Xiong, Tong Wu, Chang Kui Duan, Youwei Du, Zhang qi Yin, Pu Huang, Jiangfeng Du. 2020-08-18. Mechanical dissipation below 1$\mu$Hz with a cryogenic diamagnetic-levitated micro-oscillator. https://doi.org/10.1103/physrevapplied.15.024061

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