论文标题
将中等内部相似性重归其化组与密度基质重新归一化组相结合：壳结构和信息熵
Combining the in-medium similarity renormalization group with the density matrix renormalization group: Shell structure and information entropy
论文作者
论文摘要
我们提出了一个新型的多体框架，该框架将密度基质重新归一化组（DMRG）与中等内相似性重新归一化组的价空间（VS）公式结合在一起。与直接对角线化相比，该混合方案在大空间计算中接受了有利的计算缩放。从较富含中子的镍同位素基于手性的两种和三核子相互作用的中子镍同位素的从头算计算中，VS-DMRG方法的能力得到了强调，并使我们能够对地面和激发状态能量进行融合的逆转计算。我们还研究VS-DMRG中的轨道纠缠，并研究氧，霓虹灯和镁同位素的核相关效应。探索的纠缠措施揭示了核壳的封闭以及配对相关性。
We propose a novel many-body framework combining the density matrix renormalization group (DMRG) with the valence-space (VS) formulation of the in-medium similarity renormalization group. This hybrid scheme admits for favorable computational scaling in large-space calculations compared to direct diagonalization. The capacity of the VS-DMRG approach is highlighted in ab initio calculations of neutron-rich nickel isotopes based on chiral two- and three-nucleon interactions, and allows us to perform converged ab initio computations of ground and excited state energies. We also study orbital entanglement in the VS-DMRG, and investigate nuclear correlation effects in oxygen, neon, and magnesium isotopes. The explored entanglement measures reveal nuclear shell closures as well as pairing correlations.
