标题： 相似性变换的规范NN+3N相互作用用于12-C和16-O的第一性原理描述 显示英文标题

标题： Similarity-Transformed Chiral NN+3N Interactions for the Ab Initio Description of 12-C and 16-O

摘要： 我们首先使用相似性重整化群（SRG）变换的手征两核子（NN）和三核子（3N）相互作用进行从头算无核心壳模型（NCSM）计算，研究整个p壳层的核，特别是12-C和16-O。通过引入NCSM模型空间的自适应重要性截断和3N矩阵元的有效JT耦合方案，我们能够超越之前的NCSM研究，包括包含3N相互作用的研究，无论是在粒子数还是模型空间大小方面。我们给出了12-C和16-O的基态和激发态，模型空间最大达到N_max=12，包括完整的3N相互作用，这对于获得软SRG变换相互作用的收敛结果是足够的。我们分析了诱导和初始3N相互作用的贡献，并通过能量对SRG流参数的敏感性探测了诱导的4N项。与轻质p壳层核不同，来自手征3N相互作用长程两介子项的SRG诱导4N贡献在12-C和16-O中是显著的。 显示英文摘要

摘要： We present first ab initio no-core shell model (NCSM) calculations using similarity renormalization group (SRG) transformed chiral two-nucleon (NN) plus three-nucleon (3N) interactions for nuclei throughout the p-shell, particularly 12-C and 16-O. By introducing an adaptive importance truncation for the NCSM model space and an efficient JT-coupling scheme for the 3N matrix elements, we are able to surpass previous NCSM studies including 3N interactions regarding, both, particle number and model-space size. We present ground and excited states in 12-C and 16-O for model spaces up to N_max=12 including full 3N interactions, which is sufficient to obtain converged results for soft SRG-transformed interactions. We analyze the contributions of induced and initial 3N interactions and probe induced 4N terms through the sensitivity of the energies on the SRG flow parameter. Unlike for light p-shell nuclei, SRG-induced 4N contributions originating from the long-range two-pion terms of the chiral 3N interaction are sizable in 12-C and 16-O.