arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2002.09548nucl-thastro-ph.HEnucl-ex
收藏

三核子力:原子核与致密物质的实现与应用

Three-Nucleon Forces: Implementation and Applications to Atomic Nuclei and Dense Matter

Kai Hebeler

摘要:

原子核结构理论的最新进展通过从头计算多体计算显著地扩大了原子核结构的可及部分。这些进展为轻、中质量和重核以及核物质的微观研究开辟了新的途径,并代表了在整个核图表中系统和全面了解原子核的重要一步。虽然对于一个给定的核哈密顿量,不同的多体方法之间已经发现了显着的一致性,与实验的比较和对理论不确定性的理解仍然是重要的未决问题。观察到的实验差异表明目前使用的核相互作用和运营商的缺陷。手征有效场论(EFT)允许系统地导出核子-核子(NN)、三核子(3 N)和更高体相互作用的贡献,包括理论不确定性的估计。虽然NN相互作用在多体计算中的处理已经很好地建立,但3 N相互作用的计算及其在从头计算框架中的结合仍然是一个前沿。这项工作详细回顾了最近和目前的发展,改进的3 N相互作用的推导和实施,并提供了一个全面的介绍,其实际计算和表示的基本方法。我们进一步给出了一个概述的新的和既定的方法,促进列入和治疗的3 N相互作用的从头算原子核结构框架,并提出了一个选择的最新计算的原子核以及核物质的基础上,国家的最先进的核神经网络和3 N相互作用内手性EFT。最后,我们讨论正在进行的努力,开放的问题和未来的方向。

英文摘要:

Recent advances in nuclear structure theory have significantly enlarged the accessible part of the nuclear landscape via ab initio many-body calculations. These developments open new ways for microscopic studies of light, medium-mass and heavy nuclei as well as nuclear matter and represent an important step toward a systematic and comprehensive understanding of atomic nuclei across the nuclear chart. While remarkable agreement has been found between different many-body methods for a given nuclear Hamiltonian, the comparison with experiment and the understanding of theoretical uncertainties are still important open questions. The observed discrepancies to experiment indicate deficiencies in presently used nuclear interactions and operators. Chiral effective field theory (EFT) allows to systematically derive contributions to nucleon-nucleon (NN), three-nucleon (3N) and higher-body interactions including estimates of theoretical uncertainties. While the treatment of NN interactions in many-body calculations is well established, the calculation of 3N interactions and their incorporation in ab initio frameworks is still a frontier. This work reviews in detail recent and current developments on the derivation and implementation of improved 3N interactions and provides a comprehensive introduction to fundamental methods for their practical calculation and representation. We further give an overview of novel and established methods that facilitate the inclusion and treatment of 3N interactions in ab initio nuclear structure frameworks and present a selection of the latest calculations of atomic nuclei as well as nuclear matter based on state-of-the-art nuclear NN and 3N interactions derived within chiral EFT. Finally, we discuss ongoing efforts, open questions and future directions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑