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Quantum Many-Body Theories and Methods for Nuclear Physics

核物理量子多体理论和方法

基本信息

批准号：
2013047
负责人：
Scott Bogner
金额：
$ 60万
依托单位：
Michigan State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-08-01 至 2024-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2013047&HistoricalAwards=false
关键词：
Quantum Many Body Theories Methods

项目摘要

Nuclear Physics plays a key role in our quest to understand the Universe, addressing fundamental questions like: 1) How did visible matter come into being and how does it evolve? 2) How does subatomic matter organize itself and what phenomena emerge? 3) Are the fundamental interactions that are basic to the structure of matter fully understood?, and 4) How can the knowledge and technological progress provided by nuclear physics best be used to benefit society? In recent years, researchers have made remarkable progress in our fundamental understanding of the complex and fascinating system that is the nucleus. This progress has been driven by new theoretical insights, increased computational power, and experimental access to new exotic isotopes with a large excess of neutrons or protons. As the frontiers of experimental nuclear physics increasingly move towards the study of exotic nuclei, there is an urgent need for theorists to develop controlled, ab-initio (i.e., “first principles” or microscopic) many-body theories of the nucleus. This is because time honored phenomenological models of nuclear theory, such as the nuclear shell model and mean-field/density functional theory, are “data driven” approaches that require the presence of nearby data to fix parameters. The exploration of previously uncharted regions of the nuclear landscape therefore poses severe challenges for such models.To address these challenges, the present NSF award will work to develop new ab-initio or microscopic many-body theories and methods that are capable of reaching medium-mass nuclei and beyond. Such approaches start directly from the fundamental forces between nucleons and attempt to solve the quantum many-body equations of motion without introducing additional parameters that need to be fit to the nuclei of interest. This is computationally much more challenging than the phenomenological approaches, and requires significant computational and conceptual advances to cover the same regions of nuclei. Under the present award, the team will develop a nuclear many-body modeling infrastructure based on state-of-the-art Coupled-Cluster (CC) Theory and In-Medium Similarity Renormalization Group (IMSRG) methods, leveraged to exploit powerful techniques and algorithms from the fields of Machine Learning (ML) and Quantum Computing. The goal is to develop a comprehensive framework that is capable of providing controlled and predictive calculations for static and dynamic properties over a wide range of conditions, from nuclei to dense matter and neutron stars. These activities will be closely linked with ongoing experimental programs in low-energy nuclear physics nationally and worldwide.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

核物理学在我们探索宇宙的过程中起着关键作用，解决了以下基本问题：1）可见物质是如何形成的，它是如何进化的？2)亚原子物质是如何组织自己的，会出现什么现象？3)对于物质结构来说，基本的相互作用是否已经被完全理解了？4）如何最好地利用核物理提供的知识和技术进步造福社会？近年来，研究人员在我们对原子核这一复杂而迷人的系统的基本理解方面取得了显着进展。这一进展是由新的理论见解、计算能力的提高以及实验获得具有大量过量中子或质子的新的奇异同位素所推动的。随着实验核物理的前沿越来越多地转向对奇异核的研究，迫切需要理论家开发受控的从头算（即，原子核的“第一原理”或微观）多体理论。这是因为核理论的历史悠久的唯象模型，如核壳模型和平均场/密度泛函理论，是“数据驱动”的方法，需要附近的数据来固定参数。因此，对核领域以前未知区域的探索对这些模型提出了严峻的挑战。为了应对这些挑战，NSF将致力于发展新的从头算或微观多体理论和方法，这些理论和方法能够达到中等质量的核和更高的质量。这种方法直接从核子之间的基本力开始，并试图求解量子多体运动方程，而不引入需要拟合到感兴趣的核的额外参数。这在计算上比唯象方法更具挑战性，需要显著的计算和概念进步来覆盖相同的核区域。根据目前的奖项，该团队将开发基于最先进的耦合簇（CC）理论和介质相似性重整化群（IMSRG）方法的核多体建模基础设施，利用机器学习（ML）和量子计算领域的强大技术和算法。其目标是开发一个全面的框架，能够在广泛的条件下，从原子核到致密物质和中子星，为静态和动态特性提供受控和预测计算。这些活动将与国内和世界范围内正在进行的低能核物理实验项目密切相关。该奖项反映了NSF的法定使命，并且通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（15）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Exploring the role of high- j configurations in collective observables through the Coulomb excitation of Cd106

通过 Cd106 的库仑激发探索高 j 配置在集体可观测量中的作用

DOI：
10.1103/physrevc.103.l051301
发表时间：
2021
期刊：
Physical Review C
影响因子：
3.1
作者：
Rhodes, D.;Brown, B. A.;Henderson, J.;Gade, A.;Ash, J.;Bender, P. C.;Elder, R.;Elman, B.;Grinder, M.;Hjorth-Jensen, M.
通讯作者：
Hjorth-Jensen, M.

Dilute neutron star matter from neural-network quantum states

DOI：
10.1103/physrevresearch.5.033062
发表时间：
2022-12
期刊：
Physical Review Research
影响因子：
4.2
作者：
Bryce Fore;Jane M. Kim;Giuseppe Carleo;M. Hjorth-Jensen;A. Lovato;M. Piarulli
通讯作者：
Bryce Fore;Jane M. Kim;Giuseppe Carleo;M. Hjorth-Jensen;A. Lovato;M. Piarulli

Quasi-deuteron model at low renormalization group resolution

低重正化群分辨率下的准氘核模型