Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA.
Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Phys Rev Lett. 2018 Mar 23;120(12):122502. doi: 10.1103/PhysRevLett.120.122502.
We report accurate quantum Monte Carlo calculations of nuclei up to A=16 based on local chiral two- and three-nucleon interactions up to next-to-next-to-leading order. We examine the theoretical uncertainties associated with the chiral expansion and the cutoff in the theory, as well as the associated operator choices in the three-nucleon interactions. While in light nuclei the cutoff variation and systematic uncertainties are rather small, in ^{16}O these can be significant for large coordinate-space cutoffs. Overall, we show that chiral interactions constructed to reproduce properties of very light systems and nucleon-nucleon scattering give an excellent description of binding energies, charge radii, and form factors for all these nuclei, including open-shell systems in A=6 and 12.
我们基于局域手征二体和三体相互作用的次领头阶（next-to-next-to-leading order），报告了 A=16 以内核的精确量子蒙特卡罗计算。我们检验了手征展开和理论截止带来的理论不确定性，以及三体相互作用中相关算符的选择。虽然在轻核中，截止变化和系统不确定性相当小，但在 ^{16}O 中，对于大坐标空间截止，这些不确定性可能很显著。总体而言，我们表明，为再现极轻体系和核子-核子散射性质而构造的手征相互作用，能极好地描述所有这些核的束缚能、电荷半径和形状因子，包括 A=6 和 12 的开壳核。
