Role of spatially compact nucleon wave packets in an ab initio description of 3H within high-momentum antisymmetrized molecular dynamics
Role of spatially compact nucleon wave packets in an ab initio description of 3H within high-momentum antisymmetrized molecular dynamics
复制标题
空间致密核子波包在高动量反对称分子动力学中 3H 从头开始描述中的作用
DOI：
10.1103/physrevc.106.044310
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发表时间：
2022
影响因子：
3.1
通讯作者：
Niu Wan
中科院分区：
文献类型：
--
作者：
Masahiro Isaka;Qing Zhao;Takayuki Myo;Mengjiao Lyu;Hiroshi Toki;Hisashi Horiuchi;Hiroki Takemoto;Niu Wan
在基于反对称化分子动力学的变分方法--高动量反对称化分子动力学（HM-AMD）的框架下，我们发现了空间紧致核子波包对充分描述核子关联的重要作用.在HM-AMD中，核子之间的短程关联和张量关联由高动量核子对（高动量对）来描述，这是通过将高斯波包的大质心放在相反的符号中来给出的。本文通过改变核子高斯波包的宽度参数，进一步改善了高动量对的动量分布。通过对具有裸阿贡v8'势的核的计算，证明了新方案的可靠性。结果表明，空间紧凑的核子波包对降低总能量有重要作用，使核中有足够的高动量分量。我们还考虑了由张量相互作用引起的三核子自旋平行组态，这对收敛HM-AMD结果是必要的。最后，可比的结果，其他的理论计算得到的总能量和哈密顿分量。
We found the important role of the spatially compact nucleon wave packets to fully describe the nucleon correlations within the framework of the high-momentum antisymmetrized molecular dynamics (HM-AMD), which is a variational method based on the antisymmetrized molecular dynamics. In HM-AMD, short-range and tensor correlations between nucleons are described by nucleon pairs with high momentum (high-momentum pairs), which are given by putting large centroids of the Gaussian wave packets in opposite signs. In this paper, we further improve momentum distribution of the high-momentum pairs by varying the width parameter of the Gaussian wave packets of nucleons. We show the reliability of this new scheme by applying it to thenucleus with the bare Argonne v8' potential. It is found that the spatially compact nucleon wave packets give the important effect to lower the total energy, which brings sufficient high-momentum components in the nucleus. We also include the spin-parallel configuration of the three nucleons induced by the tensor interaction, which is necessary to converge the HM-AMD results. Finally, comparable results to the other theoretical calculations are obtained for the total energy and Hamiltonian components.