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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 |
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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.
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Received: 12 January 2021
Revised: 20 February 2021
Accepted manuscript online: 23 March 2021
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PACS:
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31.15.ap
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(Polarizabilities and other atomic and molecular properties)
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31.15.am
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(Relativistic configuration interaction (CI) and many-body perturbation calculations)
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95.55.Sh
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(Auxiliary and recording instruments; clocks and frequency standards)
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| Fund: 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). |
Corresponding Authors:
Li-Yan Tang
E-mail: lytang@wipm.ac.cn
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Cite this article:
Mi Zhou(周密) and Li-Yan Tang(唐丽艳) Calculations of dynamic multipolar polarizabilities of the Cd clock transition levels 2021 Chin. Phys. B 30 083102
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