Ab initio many-body perturbation theory and no-core shell model  

作　　者：胡柏山 吴强 许甫荣 

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China

出　　处：《Chinese Physics C》2017年第10期79-88,共10页中国物理C（英文版）

基　　金：Supported by National Key Basic Research Program of China(2013CB834402);National Natural Science Foundation of China(11235001,11320101004,11575007);the CUSTIPEN(China-U.S.Theory Institute for Physics with Exotic Nuclei) funded by the U.S.Department of Energy,Office of Science(DE-SC0009971)

摘　　要：In many-body perturbation theory（MBPT） we always introduce a parameter Nshellto measure the maximal allowed major harmonic-oscillator（HO） shells for the single-particle basis, while the no-core shell model（NCSM） uses N_（max）h？ HO excitation truncation above the lowest HO configuration for the many-body basis. It is worth comparing the two different methods. Starting from “bare” and Okubo-Lee-Suzuki renormalized modern nucleon-nucleon interactions, NNLO_（opt） and JISP16, we show that MBPT within Hartree-Fock bases is in reasonable agreement with NCSM within harmonic oscillator bases for ~4He and ^（16）O in “close” model space. In addition, we compare the results using “bare” force with the Okubo-Lee-Suzuki renormalized force.In many-body perturbation theory（MBPT） we always introduce a parameter Nshellto measure the maximal allowed major harmonic-oscillator（HO） shells for the single-particle basis, while the no-core shell model（NCSM） uses N_（max）h？ HO excitation truncation above the lowest HO configuration for the many-body basis. It is worth comparing the two different methods. Starting from “bare” and Okubo-Lee-Suzuki renormalized modern nucleon-nucleon interactions, NNLO_（opt） and JISP16, we show that MBPT within Hartree-Fock bases is in reasonable agreement with NCSM within harmonic oscillator bases for ~4He and ^（16）O in “close” model space. In addition, we compare the results using “bare” force with the Okubo-Lee-Suzuki renormalized force.

关 键 词：MBPT NCSM Okubo-Lee-Suzuki nuclear force 

分 类 号：O571[理学—粒子物理与原子核物理]