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)...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.展开更多
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)
文摘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.