Calculations of dynamic multipolar polarizabilities of the Cd clock transition levels

doi:10.1088/1674-1056/abf0fc

中国物理B ›› 2021, Vol. 30 ›› Issue (8): 83102-083102.doi: 10.1088/1674-1056/abf0fc

Calculations of dynamic multipolar polarizabilities of the Cd clock transition levels

Mi Zhou(周密)^1,2 and Li-Yan Tang(唐丽艳)^1,†

1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2021-01-12 修回日期:2021-02-20 接受日期:2021-03-23 出版日期:2021-07-16 发布日期:2021-08-09
通讯作者: Li-Yan Tang E-mail:lytang@wipm.ac.cn
基金资助:
Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0304402), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grants No. XDB21030300), and the Hubei Province Science Fund for Distinguished Young Scholars, China (Grant No. 2019CFA058).

Calculations of dynamic multipolar polarizabilities of the Cd clock transition levels

Mi Zhou(周密)^1,2 and Li-Yan Tang(唐丽艳)^1,†

1 State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China

Received:2021-01-12 Revised:2021-02-20 Accepted:2021-03-23 Online:2021-07-16 Published:2021-08-09
Contact: Li-Yan Tang E-mail:lytang@wipm.ac.cn
Supported by:
Project supported by the National Key Research and Development Program of China (Grant No. 2017YFA0304402), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grants No. XDB21030300), and the Hubei Province Science Fund for Distinguished Young Scholars, China (Grant No. 2019CFA058).

摘要/Abstract

摘要： The pursuit of a systematic frequency uncertainty beyond 10^-18 clock has triggered a multitude of investigations on the multipolar and higher-order lattice light shifts. The Cd atom has been proposed as a new candidate for the development of a lattice clock because of its smaller blackbody radiation shift at room temperature. Here, we apply an improved combined method of the Dirac-Fock plus core polarization and relativistic configuration interaction methods to calculate the dynamic multipolar polarizabilities of the Cd clock states. The effects of the high-order core-polarization potentials on the energies, reduced matrix elements, and multipolar polarizabilities have been evaluated systematically. The detailed comparison with available literature demonstrates that taking into account of the high-order core-polarization potentials is a simple and effective approach to improve the results of atomic properties for heavy atoms.

关键词: Cd atomic clock, multipolar polarizabilities, high-order core-polarization potentials, DFCP+RCI method

Abstract: The pursuit of a systematic frequency uncertainty beyond 10^-18 clock has triggered a multitude of investigations on the multipolar and higher-order lattice light shifts. The Cd atom has been proposed as a new candidate for the development of a lattice clock because of its smaller blackbody radiation shift at room temperature. Here, we apply an improved combined method of the Dirac-Fock plus core polarization and relativistic configuration interaction methods to calculate the dynamic multipolar polarizabilities of the Cd clock states. The effects of the high-order core-polarization potentials on the energies, reduced matrix elements, and multipolar polarizabilities have been evaluated systematically. The detailed comparison with available literature demonstrates that taking into account of the high-order core-polarization potentials is a simple and effective approach to improve the results of atomic properties for heavy atoms.

Key words: Cd atomic clock, multipolar polarizabilities, high-order core-polarization potentials, DFCP+RCI method

中图分类号: (Polarizabilities and other atomic and molecular properties)

31.15.ap

31.15.am (Relativistic configuration interaction (CI) and many-body perturbation calculations) 95.55.Sh (Auxiliary and recording instruments; clocks and frequency standards)

Mi Zhou(周密) and Li-Yan Tang(唐丽艳). Calculations of dynamic multipolar polarizabilities of the Cd clock transition levels[J]. 中国物理B, 2021, 30(8): 83102-083102.

Mi Zhou(周密) and Li-Yan Tang(唐丽艳). Calculations of dynamic multipolar polarizabilities of the Cd clock transition levels[J]. Chin. Phys. B, 2021, 30(8): 83102-083102.

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Calculations of dynamic multipolar polarizabilities of the Cd clock transition levels

Calculations of dynamic multipolar polarizabilities of the Cd clock transition levels

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