NSF-BSF: Universality Puzzles and Coherent Control of Efimov Physics with 7Li Atoms

NSF-BSF：7Li 原子 Efimov 物理的普遍性难题和相干控制

• 批准号: 2012125
• 负责人: Jose D'Incao
• 金额: $ 24万
• 依托单位: University of Colorado at Boulder
• 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 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2012125&HistoricalAwards=false
• 关键词: NSF; BSF; Universality; Puzzles; Coherent

Interactions among a few atoms will be explored by this project, and in particular, ways to achieve quantum control in the regime of ultracold temperatures where a gas becomes quantum mechanical in nature. Few-atom systems with their extremely nonperturbative interactions pose some of the greatest challenges for atomic theorists and provide many opportunities to advance our scientific knowledge with potential technological and fundamental impacts. This project represents a theoretical and experimental collaboration via the US National Science Foundation (NSF) and the US-Israel Binational Science Foundation (BSF). The goal of the project is to develop the theoretical tools, which, combined with experimental analysis, will enable a detailed investigation of properties of strongly interacting quantum gases with a focal point on developing control of the complex multichannel collision dynamics using either a static external field or an electromagnetic field. A specific goal is to explore 7Li ultracold quantum gases to understand puzzling observations related to the nature of the universality of Efimov states in the system. These studies will serve as the base of the main focus of this theory-experiment collaboration, which involves the exploration of new physics near the 7Li ultra-narrow Feshbach resonance and atom-dimer mixtures. Particular attention will be given on the determination of the scattering properties and lifetime of Efimov states as well as the underlying physical mechanisms which make 7Li gases a unique system to explore universal quantum physics. The project also includes studies for the implementation of coherent control over few-body processes which can enable the stabilization of strongly interacting gases, by turning off few-body losses, as well as open up ways to control three-body interactions and superposition states, allowing for the creation of exotic dynamical regimes. Beyond that, a deeper understanding of the ultracold atom interactions can spawn applications to atomic clocks, quantum information science, and the exploration of many novel phases of matter. The key educational impact of this work derives from the training of graduate and undergraduate students in state-of-the-art theoretical and computational research techniques.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.

该项目将探索几个原子之间的相互作用，特别是在超冷温度下实现量子控制的方法，其中气体在本质上成为量子力学。具有极非微扰相互作用的少原子系统对原子理论家提出了一些最大的挑战，并提供了许多机会来推进我们的科学知识，具有潜在的技术和基础影响。该项目代表了美国国家科学基金会（NSF）和美国-以色列两国科学基金会（BSF）的理论和实验合作。该项目的目标是开发理论工具，结合实验分析，将能够详细研究强相互作用量子气体的特性，重点是使用静态外部场或电磁场控制复杂的多通道碰撞动力学。一个具体的目标是探索7 Li超冷量子气体，以了解与系统中Efimov态的普遍性性质有关的令人困惑的观察结果。这些研究将作为这一理论-实验合作的主要焦点的基础，其中包括探索7 Li超窄Feshbach共振和原子-二聚体混合物附近的新物理。特别注意的是将给予的散射特性和寿命的Efimov状态的确定，以及潜在的物理机制，使7 Li气体一个独特的系统，探索普遍的量子物理。该项目还包括研究对少体过程实施相干控制，通过关闭少体损失，可以稳定强相互作用气体，并开辟控制三体相互作用和叠加态的方法，从而创造奇异的动力学机制。除此之外，对超冷原子相互作用的更深入理解可以产生原子钟，量子信息科学和探索许多新的物质相的应用。这项工作的主要教育影响来自于对研究生和本科生进行最先进的理论和计算研究技术的培训。该奖项反映了NSF的法定使命，并通过使用基金会的智力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

Quenched magneto-association of ultracold Feshbach molecules

超冷 Feshbach 分子的淬火磁缔合

• DOI: 10.1103/physreva.104.033310
• 发表时间: 2021
• 期刊: Physical review and Physical review letters index
• 作者: Kirk Waiblinger, Jason R.

Unitary p-wave interactions between fermions in an optical lattice

• DOI: 10.1038/s41586-022-05405-6
• 发表时间: 2022-05
• 期刊: Nature
• 影响因子: 64.8
• 作者: Vijin Venu;Peihang Xu;M. Mamaev;F. Corapi;T. Bilitewski;J. D’Incao;Cora J. Fujiwara;A. Rey;J. Thywissen

Energy scaling of the product state distribution for three-body recombination of ultracold atoms

• DOI: 10.1103/physrevresearch.5.013161
• 发表时间: 2022-11
• 期刊: Physical Review Research
• 影响因子: 4.2
• 作者: S. Haze;J. D’Incao;D. Dorer;Jing-Lun Li;M. Deiss;E. Tiemann;P. Julienne;J. Denschlag

Ultracold molecular collisions in magnetic fields: Efficient incorporation of hyperfine structure in the total rotational angular momentum representation

• DOI: 10.1103/physreva.108.053317
• 发表时间: 2023-06
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: T. Tscherbul;J. D’Incao