Relativistic coupled-cluster-theory analysis of unusually large correlation effects in the determination of g(j) factors in Ca+

doi:10.1103/PhysRevA.96.012511

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	Relativistic coupled-cluster-theory analysis of unusually large correlation effects in the determination of g(j) factors in Ca+
	Kumar, Pradeep 1,3; Sahoo, B. K.2,3
刊名	PHYSICAL REVIEW A
	2017-07-17
卷号	96 期号:1
DOI	10.1103/PhysRevA.96.012511
文献子类	Article
英文摘要	We investigate roles of electron correlation effects in the determination of the g(j) factors of the 4s(2)S(1/2), 4p(2)P(1/2), 4p(2)P(3/2), 3d(2)D(3/2), and 3d(2)D(5/2) states, representing different parities and angular momenta, of the Ca+ ion. Correlation contributions are highlighted with respect to the mean-field values evaluated using the Dirac-Hartree-Fock method, relativistic second-order many-body theory, and relativistic coupled-cluster (RCC) theory with the single-and double-excitation approximation considering only the linear terms and also accounting for all the nonlinear terms. This shows that it is difficult to achieve results below 10(-5) precision employing an approximate perturbative approach. We also find that contributions through the nonlinear terms and higher-level excitations such as triple excitations, estimated perturbatively in the RCC method, are found to be crucial to attain precise values of the gj factors in the considered states of the Ca+ ion.
WOS关键词	ATOMS ; STATE
WOS研究方向	Optics ; Physics
语种	英语
WOS记录号	WOS:000405686900005
资助机构	CAS through a PIFI Fellowship(2017VMB0023) ; CAS through a PIFI Fellowship(2017VMB0023) ; TDP project of the Physical Research Laboratory (PRL), Ahmedabad ; TDP project of the Physical Research Laboratory (PRL), Ahmedabad ; CAS through a PIFI Fellowship(2017VMB0023) ; CAS through a PIFI Fellowship(2017VMB0023) ; TDP project of the Physical Research Laboratory (PRL), Ahmedabad ; TDP project of the Physical Research Laboratory (PRL), Ahmedabad
内容类型	期刊论文
源URL	[http://ir.wipm.ac.cn/handle/112942/11457]
专题	武汉物理与数学研究所_理论与交叉研究部
作者单位	1.Indian Inst Technol Gandhinagar, Gandhinagar 382355, Gujarat, India 2.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Hubei, Peoples R China 3.Phys Res Lab, Atom Mol & Opt Phys Div, Ahmadabad 380009, Gujarat, India
推荐引用方式 GB/T 7714	Kumar, Pradeep,Sahoo, B. K.. Relativistic coupled-cluster-theory analysis of unusually large correlation effects in the determination of g(j) factors in Ca+[J]. PHYSICAL REVIEW A,2017,96(1).
APA	Kumar, Pradeep,&Sahoo, B. K..(2017).Relativistic coupled-cluster-theory analysis of unusually large correlation effects in the determination of g(j) factors in Ca+.PHYSICAL REVIEW A,96(1).
MLA	Kumar, Pradeep,et al."Relativistic coupled-cluster-theory analysis of unusually large correlation effects in the determination of g(j) factors in Ca+".PHYSICAL REVIEW A 96.1(2017).