Detection of DC electric forces with zeptonewton sensitivity by single-ion phonon laser

Detecting extremely small forces helps exploring new physics quantitatively. Here we demonstrate that the phonon laser made of a single trapped \(^{40}\)Ca\(^{+}\) ion behaves as an exquisite sensor for small force measurement. We report our successful detection of small electric forces regarding th...

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Bibliographic Details
Published inarXiv.org
Main Authors Ya-Qi, Wei, Ying-Zheng, Wang, Zhi-Chao, Liu, Tai-Hao Cui, Chen, Liang, Li, Ji, Shuang-Qin Dai, Zhou, Fei, Feng, Mang
Format Paper
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 15.07.2022
Subjects
Direct current
Force measurement
Frequency locking
Phonons
Sensitivity
Trapping
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Summary:Detecting extremely small forces helps exploring new physics quantitatively. Here we demonstrate that the phonon laser made of a single trapped \(^{40}\)Ca\(^{+}\) ion behaves as an exquisite sensor for small force measurement. We report our successful detection of small electric forces regarding the DC trapping potential with sensitivity of 2.41\(\pm\)0.49 zN/\(\sqrt{{\rm Hz}}\), with the ion only under Doppler cooling, based on the injection-locking of the oscillation phase of the phonon laser in addition to the classical squeezing applied to suppress the measurement uncertainty. We anticipate that such a single-ion sensor would reach a much better force detection sensitivity in the future once the trapping system is further improved and the fluorescence collection efficiency is further enhanced.
ISSN:2331-8422