Strongly Interacting Quantum Mixtures of Ultracold Atoms

超冷原子的强相互作用量子混合物

• 批准号: 2012110
• 负责人: Martin Zwierlein
• 金额: $ 100.21万
• 依托单位: Massachusetts Institute of Technology
• 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: 2020-08-15 至 2025-07-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2012110&HistoricalAwards=false
• 关键词: Strongly; Interacting; Quantum; Mixtures; Ultracold

Electrons run our modern world: They zip through our light bulbs, smart phones, laptops, and TV screens. But remarkably, we do not understand fundamentally how they work together. We know electrons obey the rules of quantum mechanics: They can propagate as waves rather than billiard balls, and a fundamental principle forbids two of them to be in one and the same wave. But if we understood how an entire collection of electrons behaved in general, we could design materials that carry electricity without any loss. Laptops and smart phones would not heat up, we would not waste energy that could run entire countries just to transmit power between cities, and on an even more fundamental level we would understand the fabric of matter itself. This present project is designed to address these very points. The project will use atoms as stand-ins for electrons and other elementary particles to search for novel collective states of matter. In particular, the project aims to uncover the rules by which loss-less transport can occur in general settings, including superfluid states of matter - where atoms flow without friction - and novel states of collective flow in the presence of high magnetic fields.The present project will perform precision studies of the thermodynamics, collective excitations and transport properties of strongly interacting mixtures of bosons (Na) and fermions (40K and 6Li), with the goal of uncovering novel states of fermionic matter: From boson-induced superfluidity, inhomogeneous superfluidity in spin-imbalanced mixtures, to quantum Hall states of fermions and bosonic molecules. Feshbach scattering resonances will be used to tune interparticle interactions, and optical box potentials will be employed to realize homogeneous densities. Transport of spin, sound and heat will be performed using novel detection methods, e.g. the propagation of heat will be directly imaged. In-situ observations of excitations such as vortices and solitons will allow investigation of their stability as a function of species composition and effective magnetic fields. Comparisons to theoretical calculations, where they exist, will be made, which should advance our understanding of strongly interacting Fermi systems.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.

电子运行我们的现代世界：它们通过我们的灯泡，智能手机，笔记本电脑和电视屏幕拉链。但是值得注意的是，我们根本不理解它们如何共同努力。我们知道电子遵守量子力学的规则：它们可以作为波传播而不是台球球，并且基本原理禁止其中两个在一个和同一波浪中。但是，如果我们了解整个电子集合的表现如何，我们可以设计携带电力而不会损失的材料。笔记本电脑和智能手机不会升温，我们不会浪费能够运行整个国家的能源，以在城市之间传递电力，并且在更基本的水平上，我们会理解物质本身的结构。本项目旨在解决这些要点。 该项目将将原子用作电子和其他基本粒子的替代品来寻找物质的新集体状态。特别是，该项目旨在揭示在一般环境中可以进行无损失运输的规则，包括物质的超流量状态 - 原子没有摩擦的流动 - 在存在高磁场的情况下集体流动的新颖状态。当前的项目将对热力学，集体兴奋和强烈相互作用的靶向型和Fermoss（NA）（NA）（NA）（NA）（NA）（na）（na）（na）（na）（na）（na）（na）（na）（na）（40）的射击性能进行精确研究。费尔米金物质：从玻色子诱导的超流体，自旋影响混合物中的不均匀多流体，到fermions和玻色子分子的量子大厅状态。 Feshbach散射共振将用于调整颗粒间相互作用，并将使用光盒电位来实现均匀的密度。自旋，声音和热的传输将使用新型检测方法进行，例如热的传播将直接成像。对涡流和孤子等激发的原位观察将允许研究其稳定性，这是物种组成和有效磁场的函数。将进行与理论计算的比较（将要进行的理论计算，这应该提高我们对强烈相互作用的费米系统的理解。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评估评估标准来通过评估来获得支持的。

项目成果

Direct observation of nonlocal fermion pairing in an attractive Fermi-Hubbard gas

直接观察有吸引力的费米-哈伯德气体中的非局域费米子配对

• DOI: 10.1126/science.ade4245
• 发表时间: 2023
• 期刊: Science
• 影响因子: 56.9
• 作者: Hartke, Thomas;Oreg, Botond;Turnbaugh, Carter;Jia, Ningyuan;Zwierlein, Martin
• 通讯作者: Zwierlein, Martin

Quantum register of fermion pairs

• DOI: 10.1038/s41586-021-04205-8
• 发表时间: 2022-01-27
• 期刊: NATURE
• 影响因子: 64.8
• 作者: Hartke, Thomas;Oreg, Botond;Zwierlein, Martin
• 通讯作者: Zwierlein, Martin

Crystallization of bosonic quantum Hall states in a rotating quantum gas

旋转量子气体中玻色子量子霍尔态的结晶

• DOI: 10.1038/s41586-021-04170-2
• 发表时间: 2022
• 期刊: Nature
• 影响因子: 64.8
• 作者: Mukherjee, Biswaroop;Shaffer, Airlia;Patel, Parth B.;Yan, Zhenjie;Wilson, Cedric C.;Crépel, Valentin;Fletcher, Richard J.;Zwierlein, Martin
• 通讯作者: Zwierlein, Martin