手征三体力与原子核第一性原理研究  

Chiral three-body forces and nuclear first-principles studies

作　　者：马远卓 李健国 孙中浩 胡柏山 张爽 许甫荣[1] MA YuanZhuo;LI JianGuo;SUN ZhongHao;HU BaiShan;ZHANG Shuang;XU FuRong(State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,China)

机构地区：[1]北京大学物理学院,核物理与核技术国家重点实验室,北京100871

出　　处：《中国科学：物理学、力学、天文学》2023年第10期90-100,共11页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家重点基础研究发展计划(编号:2018YFA0404401);国家自然科学基金(编号:11835001,11921006,12035001,12105106,12205340);中国博士后自然科学基金(编号:BX20200136,2020M682747);北京大学核物理与核技术国家重点实验室(编号:NPT2020KFY13)资助项目。

摘　　要：从第一性原理(ab initio)出发研究原子核已经成为当今理论核物理领域的前沿方向,它不仅能够提供高精度的计算结果与可靠的理论预言,而且能够在有效场论的基础上建立起与底层基本理论(量子色动力学-QCD)联系的桥梁.近年来,随着手征核力与量子多体理论的发展与完善,以及新一代超级计算机的不断涌现,原子核第一性原理研究取得了令人瞩目的成就.一方面,在手征有效场论框架下构建起来的核力能够高精度地复现核子-核子散射数据;另一方面,先进的量子多体方法已经能够将第一性原理计算的边界从轻核区推向中重质量核区、从深束缚的稳定核推向滴线区的不稳定核.最近10余年,我们在手征核力和量子多体方法两个方面开展了深入的研究,特别是,手征三体力与连续谱耦合效应.作为手征核力的重要成分,三体力对有限核与核物质的理论描述有着广泛和重要的影响,而连续谱效应则对滴线区原子核的理论计算非常关键.本文综述了我们在手征三体力和含连续谱第一性原理研究方面所取得的进展.Nuclear first-principles(or called ab initio)studies are the frontier of theoretical nuclear physics research for their reliable predictions and the ability to guide experiments.It bridges low-energy nuclear physics and the fundamental theory(quantum chromodynamics QCD)through the Chiral effective field theory.In past decades,ab initio methods have gained great success,benefiting from developments of quantum many-body methods and computer hardware.Using the innovative quantum many-body methods and the chiral potential that is fitted to low-energy nucleon-nucleon scattering data,ab initio calculations have been pushed from the light mass nuclei to heavy mass nuclei,from wellbound stable nuclei to weakly bound or unbound nuclei.During pasting years,we have been concentrating on exploring two aspects in ab initio calculations:chiral three-body forces and continuum effects.Chiral three-body forces have been shown to have broad influences on both the properties of finite nuclei and nuclear matter.Continuum effects are the key ingredient in the calculations of weakly bound or unbound nuclei.This paper reviews the series of achievements that we gained in the development of chiral three-body forces and ab initio Gamow shell model which takes the continuum coupling into account.

关 键 词：第一性原理 手征三体力 共振态 连续谱 滴线区原子核 

分 类 号：O469[理学—凝聚态物理]