New designed helical resonator to improve measurement accuracy of magic radio frequency

作     者：郭天 刘培亮 李朝红 Tian Guo;Peiliang Liu;Chaohong Lee

作者机构：Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing&School of Physics and AstronomySun Yat-Sen University(Zhuhai Campus)Zhuhai 519082China State Key Laboratory of Optoelectronic Materials and TechnologiesSun Yat-Sen University(Guangzhou Campus)Guangzhou 510275China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2022年第31卷第9期

页      面：268-272页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0804[工学-仪器科学与技术] 0702[理学-物理学] 

基　　金：Project supported by the Key-Area Research and Development Program of Guangdong Province,China(Grant No.2019B030330001) the National Natural ScienceFoundation of China(Grant Nos.12025509 and 11904418) the Science and Technology Program of Guangzhou,China(Grant No.201904020024) the Fundamental Research Funds for the Central Universities,China. 

主　　题：trapped ions helical resonator magic radio frequency precision measurements 

摘      要：Based upon the new designed helical resonator,the resonant radio frequency(RF)for trapping ions can be consec-utively adjusted in a large range(about 12 MHz to 29 MHz)with high Q-factors(above 300).We analyze the helical resonator with a lumped element circuit model and find that the theoretical results fit well with the experimental data.With our resonator system,the resonant frequency near magic RF frequency(where the scalar Stark shift and the second-order Doppler shift due to excess micromotion cancel each other)can be continuously changed at kHz level.For ^(88)Sr^(+) ion,compared to earlier results,the measurement accuracy of magic RF frequency can be improved by an order of magnitude upon rough calculation,and therefore the net micromotion frequency shifts can be further reduced.Also,the differential static scalar polarizability △α0 of clock transition can be experimentally measured more accurately.