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Hartree-Fock基矢下第一性原理的多体微扰理论计算
Ab initio Many-body Perturbation Calculations with Chiral N3LO Interaction
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摘要: 从现实核力出发(手征有效场论N3LO),应用多体微扰理论对一些双幻核进行计算.借助相似重整化群理论对手征有效场论核力进行“软化”处理.在Hartree-Fock基矢下对有效哈密顿量进行多体微扰理论计算,对能量的修正计算到第三阶,对波函数微扰修正到第二阶.利用反对称化的Goldstone图对波函数进行展开,进而对单体密度进行修正,从单体密度出发对原子核半径进行计算.与实验数据进行对比,给出了很好的计算结果.
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关键词:
- 第一性原理计算 /
- 手征有效场论 /
- 多体微扰理论 /
- 相似重整化群 /
- 4He、16O基态性质
Abstract: Starting from chiral N3LO,we have applied many-body perturbation theory (MBPT) to the structure of spherical,doubly closed-shell nuclei.The two-body N3LO interaction is softened by a similarity renormalization group transformation.The MBPT calculations are performed within the Hartree-Fock (HF) bases.Higher-order corrections in the HF basis are small relative to the leading-order perturbative result.Corrections up to the third order in energy and up to the second order in wave function are evaluated.Using the anti-symmetrized Goldstone diagram expansions of the wave function,we directly correct the one-body density for the calculation of the radius.Our results are in very good agreement with experimental data. -
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