NSF-BSF: High-Precision Atomic Methodologies and New Physics Searches

NSF-BSF：高精度原子方法和新物理搜索

• 批准号: 2012068
• 负责人: Marianna Safronova
• 金额: $ 40.05万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2012068&HistoricalAwards=false
• 关键词: NSF; BSF; Precision; Atomic; Methodologies

This project addresses a set of open fundamental problems at the intersection of atomic, particle physics, and cosmology. The PI plans to set up a program to search for new light particles and forces. The research will provide theoretical results that are necessary to take full advantage of the rapid progress in tabletop precision atomic physics experiments that can then act as a new frontier in searches for new physics. Any such discovery of new physics will revolutionize the field of particle physics and, if the new particle is the dark matter, potentially also our understanding of the Universe. The goals of this project are to spearhead a new generation of atomic precision measurements aimed at searches for physics beyond the standard model of elementary particles and interactions, with a particular focus on novel atomic clocks with high sensitivity to new physics effects and dark matter. Specifically, the PI will (1) develop atomic theory needed for new generation of new physics searches with precision atomic measurements; (2) develop theoretical tools for the interpretation of experimental results, dearly needed to be able to take full advantage of the innovative concepts for new physics searches via ultra-accurate measurements; and (3) investigate specific dark matter scenarios that can be probed with atomic clocks. Atomic theory development in this project focuses on methods to treat two types of very different problems: (1) cases where none of the precision methods work at all, and theory cannot provide reliable estimates (2) cases where exceptional sub-percent precision is required, and even most accurate present methods are inadequate. For the first problem, the team will build upon the fast parallel configuration interaction (CI) code that was recently developed and develop algorithms for efficient selection of the configuration functions that need to be included for reliable predictions at the 10% level. For the second problem, the team will expand the inclusion of the electronic correlations in the hybrid method that combines CI and coupled-cluster approaches.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.

该项目在原子，粒子物理学和宇宙学的交集上解决了一系列开放的基本问题。 PI计划建立一个程序来搜索新的光颗粒和力。该研究将提供理论上的结果，这些结果可以充分利用桌面精确原子物理学实验的快速进步，然后可以作为寻找新物理学的新领域。任何这种新物理学的发现都会彻底改变粒子物理领域，如果新粒子是暗物质，我们也可能对宇宙的理解。该项目的目标是将新一代的原子精度测量带头，该测量旨在搜索除基本颗粒和相互作用的标准模型之外的物理学，并特别关注对新物理效应和暗物质具有高度敏感的新型原子钟。具体而言，PI将（1）开发新一代新一代物理搜索所需的原子理论，并具有精确的原子测量； （2）开发理论工具来解释实验结果，非常需要通过超精确测量来充分利用新物理搜索的创新概念； （3）研究可以用原子钟探测的特定暗物质方案。该项目中的原子理论的发展着重于处理两种非常不同的问题的方法：（1）精确方法根本没有起作用的情况，而理论无法提供可靠的估计值（2）需要出色的次级精度，甚至最准确的当前方法甚至不足。对于第一个问题，团队将基于最近开发的快速并行配置交互（CI）代码，并开发了有效选择配置功能的算法，这些功能需要包括在10％级别上可靠的预测。对于第二个问题，团队将扩大将CI和耦合群集方法结合的混合方法中的电子相关性扩展。该奖项反映了NSF的法定任务，并被认为值得通过基金会的知识分子优点和更广泛的影响审查标准通过评估来进行评估。

项目成果

Optical telecommunications-band clock based on neutral titanium atoms

基于中性钛原子的光通信波段时钟

• DOI: 10.1103/physreva.107.l051102
• 发表时间: 2023
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: Eustice, Scott;Filin, Dmytro;Schrott, Jackson;Porsev, Sergey;Cheung, Charles;Novoa, Diego;Stamper-Kurn, Dan M.;Safronova, Marianna S.
• 通讯作者: Safronova, Marianna S.

Calculation of energies and hyperfine-structure constants of U+233 and U233

U 233 和 U233 的能量和超精细结构常数的计算

• DOI: 10.1103/physreva.106.042810
• 发表时间: 2022
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: Porsev, S. G.;Cheung, C.;Safronova, M. S.
• 通讯作者: Safronova, M. S.