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

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摘要 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±0.49)zN/√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.
出处 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2022年第11期107-114,共8页 中国科学:物理学、力学、天文学(英文版)
基金 supported by the Special Project for Research and Development in Key Areas of Guangdong Province(Grant No.2020B0303300001) National Key Research&Development Program of China(Grant No.2017YFA0304503) National Natural Science Foundation of China(Grant Nos.U21A20434,12074390,11835011,and 11734018)。
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