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题名: Projection techniques to approach the nuclear many-body problem
作者: Sun, Y
刊名: PHYSICA SCRIPTA
出版日期: 2016
卷号: 91, 期号:4, 页码:43005
关键词: shell model ;  angular momentum projection ;  deformed basis
学科分类: Physics
DOI: http://dx.doi.org/10.1088/0031-8949/91/4/043005
通讯作者: Sun, Y (reprint author), Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China. ;  Sun, Y (reprint author), Shanghai Jiao Tong Univ, Collaborat Innovat Ctr IFSA CICIFSA, Shanghai 200240, Peoples R China. ;  Sun, Y (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
文章类型: Editorial Material
英文摘要: Our understanding of angular-momentum-projection goes beyond quantum-number restoration for symmetry-violated states. The angular-momentum-projection method can be viewed as an efficient way of truncating the shell-model space which is otherwise too large to handle. It defines a transformation from the intrinsic system, where dominant excitation modes in the low-energy region are identified with the concept of spontaneous symmetry breaking, to the laboratory frame with well-organized configuration states according to excitations. An energydictated, physically-guided shell-model truncation can then be carried out within the projected space and the Hamiltonian is thereby diagonalized in a compact basis. The present article reviews the theory of angular-momentum-projection applied in the nuclear many-body problem. Angular momentum projection emerges naturally if a deformed state is treated quantum-mechanically. To demonstrate how different physical problems in heavy, deformed nuclei can be efficiently described with different truncation schemes, we introduce the projected shell model and show examples of calculation in a basis with axial symmetry, a basis with triaxiality, and a basis with both quasiparticle and phonon excitations. Technical details of how to calculate the projected matrix elements and how to build a workable model with the projection techniques are given in the appendix.
类目[WOS]: Physics, Multidisciplinary
关键词[WOS]: ANGULAR-MOMENTUM PROJECTION ;  HIGH-SPIN STATES ;  RARE-EARTH NUCLEI ;  QUANTUM NUMBER PROJECTION ;  SHELL-MODEL CALCULATIONS ;  PLUS-QUADRUPOLE MODEL ;  ODD-MASS NUCLEI ;  MATRIX-ELEMENTS ;  COLLECTIVE MOTION ;  SHAPE COEXISTENCE
收录类别: SCI
语种: 英语
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/21707
Appears in Collections:理论物理所2016年知识产出_期刊论文

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Sun, Y. Projection techniques to approach the nuclear many-body problem[J]. PHYSICA SCRIPTA,2016,91(4):43005.
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