Reexamining the variational two-particle reduced density matrix for nuclear systems

doi:10.1103/PhysRevC.103.064324

	Reexamining the variational two-particle reduced density matrix for nuclear systems
	Li, J. G.2,3; Michel, N.1,4; Zuo, W.1,4; Xu, F. R.2,3
刊名	PHYSICAL REVIEW C
	2021-06-23
卷号	103 期号:6 页码:13
ISSN号	2469-9985
DOI	10.1103/PhysRevC.103.064324
通讯作者	Xu, F. R.(frxu@pku.edu.cn)
英文摘要	In most nuclear many-body methods, observables are calculated using many-body wave functions explicitly. The variational two-particle reduced density matrix method is one of the few exceptions to the rule. Ground-state energies of both closed-shell and open-shell nuclear systems can indeed be evaluated by minimizing a constrained linear functional of the two-particle reduced density matrix. However, it has virtually never been used in nuclear theory, because nuclear ground states were found to be well overbound, contrary to those of atoms and molecules. Consequently, we introduced new constraints in the nuclear variational two-particle reduced density matrix method, developed recently for atomic and molecular systems. Our calculations then show that this approach can provide a proper description of nuclear systems where only valence neutrons are included. For the nuclear systems where both neutrons and protons are active, however, the energies obtained with the variational two-particle reduced density matrix method are still overbound. The possible reasons for the noticed discrepancies and solutions to this problem will be discussed.
资助项目	National Key R&D Program of China[2018YFA0404401] ; National Natural Science Foundation of China[11835001] ; National Natural Science Foundation of China[11921006] ; National Natural Science Foundation of China[12035001] ; National Natural Science Foundation of China[11975282] ; State Key Laboratory of Nuclear Physics and Technology, Peking University[NPT2020KFY13] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB34000000] ; Key Research Program of the Chinese Academy of Sciences[XDPB15] ; CUSTIPEN (China-US Theory Institute for Physics with Exotic Nuclei) - US Department of Energy, Office of Science[de-sc0009971]
WOS关键词	SHELL-MODEL ; TRUNCATION SCHEME ; COLLECTIVE MOTION
WOS研究方向	Physics
语种	英语
出版者	AMER PHYSICAL SOC
WOS记录号	WOS:000665616500001
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China ; State Key Laboratory of Nuclear Physics and Technology, Peking University ; Strategic Priority Research Program of Chinese Academy of Sciences ; Key Research Program of the Chinese Academy of Sciences ; CUSTIPEN (China-US Theory Institute for Physics with Exotic Nuclei) - US Department of Energy, Office of Science
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/137038]
专题	中国科学院近代物理研究所
通讯作者	Xu, F. R.
作者单位	1.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China 2.Peking Univ, Sch Phys, Beijing 100871, Peoples R China 3.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Li, J. G.,Michel, N.,Zuo, W.,et al. Reexamining the variational two-particle reduced density matrix for nuclear systems[J]. PHYSICAL REVIEW C,2021,103(6):13.
APA	Li, J. G.,Michel, N.,Zuo, W.,&Xu, F. R..(2021).Reexamining the variational two-particle reduced density matrix for nuclear systems.PHYSICAL REVIEW C,103(6),13.
MLA	Li, J. G.,et al."Reexamining the variational two-particle reduced density matrix for nuclear systems".PHYSICAL REVIEW C 103.6(2021):13.