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New designed helical resonator to improve measurement accuracy of magic radio frequency |
| Tian Guo(郭天)1,2, Peiliang Liu(刘培亮)1,2,†, and Chaohong Lee(李朝红)1,2 |
1 Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing&School of Physics and Astronomy, Sun Yat-Sen University(Zhuhai Campus), Zhuhai 519082, China;
2 State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen University(Guangzhou Campus), Guangzhou 510275, China |
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Abstract Based upon the new designed helical resonator, the resonant radio frequency (RF) for trapping ions can be consecutively 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 88Sr+ 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 Δα0 of clock transition can be experimentally measured more accurately.
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Received: 23 February 2022
Revised: 15 April 2022
Accepted manuscript online: 22 April 2022
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PACS:
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32.30.Bv
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(Radio-frequency, microwave, and infrared spectra)
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32.10.Dk
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(Electric and magnetic moments, polarizabilities)
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37.10.Ty
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(Ion trapping)
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37.90.+j
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(Other topics in mechanical control of atoms, molecules, and ions)
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| Fund: Project supported by the Key-Area Research and Development Program of Guangdong Province, China (Grant No. 2019B030330001), the National Natural Science Foundation of China (Grant Nos. 12025509 and 11904418), the Science and Technology Program of Guangzhou, China (Grant No. 201904020024), and the Fundamental Research Funds for the Central Universities, China. |
Corresponding Authors:
Peiliang Liu
E-mail: liupliang@mail.sysu.edu.cn
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Cite this article:
Tian Guo(郭天), Peiliang Liu(刘培亮), and Chaohong Lee(李朝红) New designed helical resonator to improve measurement accuracy of magic radio frequency 2022 Chin. Phys. B 31 093201
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