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CAREER: Probing Non-Equilibrium Dynamics with Ultracold Atoms in Optical, Phononic, and Photonic Lattices

职业：用超冷原子探测光学、声子和光子晶格中的非平衡动力学

基本信息

批准号：
1848316
负责人：
Chen-Lung Hung
金额：
$ 55万
依托单位：
Purdue University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-03-15 至 2024-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1848316&HistoricalAwards=false
关键词：
CAREER Probing Non Equilibrium Dynamics

项目摘要

Non-technical summaryUnderstanding non-equilibrium dynamics in quantum systems has been a major focus in quantum physics and materials research. Applications range from manipulating thermal and electronic transport in solids to controlling information propagation in a quantum network that behaves like an interacting quantum system. Non-equilibrium dynamics is however not very well-understood in certain quantum materials, especially for those with strong interactions between constituents. To gain precise knowledge on the quantum dynamics of interest, a quantum material with precise local probes and control is highly desired. This CAREER award supports an experimental research and education program to assemble a designer quantum material for the exploration of elusive non-equilibrium quantum dynamics. The proposed material consists of an array of cold neutral atoms, each cooled to its quantum mechanical ground state, and controlled by novel potentials formed by optical, phononic and nanophotonic lattices to mimic various types of quantum materials. The project aims at inducing and probing a variety of quantum dynamical phenomena not previously realized. Success in this project will lead to advancement in controlling atomic quantum materials and in deeper understanding of quantum many-body and statistical physics. Due to broad experimental techniques involved in this research program, the project will provide solid research training for both graduate and undergraduate students. Furthermore, in collaboration with the Purdue Physics and Astronomy Outreach office, the project will initiate a secondary-grade outreach program aimed at improving the learning capital and STEM career orientation of underrepresented minority students.Technical summaryThis CAREER award supports an experimental research and education program to explore non-equilibrium dynamics in an atomic quantum gas using a state-of-the-art cold atom toolbox for optical, phononic, and nanophotonic lattice engineering. One thrust of this CAREER project is probing quantum critical dynamics of an atomic quantum gas in an optical lattice. In particular, the PI will employ a new experimental scheme to access a superfluid-to-Mott insulator quantum critical point, enabling various ways to explore critical thermodynamics and transport problems that have remained elusive to date. Furthermore, the PI will explore quasiparticle control to engineer a phononic band gap crystal in a superfluid quantum gas that can inhibit phonon transport, just as electronic band gaps do to electrons in solid state crystals. It can be engineered to manipulate thermal and entropy transport in a superfluid sample. The PI will perform dynamical control of the phononic crystals, therefore allowing for the exploration of phononic analogues of electrodynamics phenomena. For a long-term goal of this CAREER project on probing novel quantum dynamics, the PI will aim at further integrating ultracold atoms with nanophotonic lattices to form a designer hybrid material, where the atom-surface Casimir-Polder interaction provides a deep subwavelength lattice potential for entering new regimes of quantum dynamics. Success in this project will advance our knowledge in understanding quantum critical dynamics, provide valuable insights to quantum transport in phononic bandgap materials, and potentially lead to the observation of unexpected new quantum phenomena with a designer hybrid quantum material. The broad experimental techniques involved in this research program will provide solid research training for both graduate and undergraduate students. Furthermore, in collaboration with the Purdue Physics and Astronomy Outreach office, the project will initiate a secondary-grade outreach program, aimed at improving the learning capital and STEM career orientation of underrepresented minority students.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.

理解量子系统中的非平衡动力学一直是量子物理和材料研究的主要焦点。应用范围从操纵固体中的热和电子输运到控制量子网络中的信息传播，其行为就像一个相互作用的量子系统。然而，在某些量子材料中，非平衡动力学并不是很好地理解，特别是对于那些成分之间具有强相互作用的材料。为了获得有关量子动力学的精确知识，高度需要具有精确局部探针和控制的量子材料。该奖项支持一项实验研究和教育计划，以组装设计量子材料，用于探索难以捉摸的非平衡量子动力学。所提出的材料由一组冷中性原子组成，每个原子冷却到其量子力学基态，并由光学、声子和纳米光子晶格形成的新电位控制，以模拟各种类型的量子材料。该项目旨在诱导和探索各种以前未实现的量子动力学现象。该项目的成功将导致原子量子材料控制的进步，以及对量子多体和统计物理的深入理解。由于该研究项目涉及广泛的实验技术，该项目将为研究生和本科生提供坚实的研究训练。此外，该项目将与普渡大学物理与天文学外联办公室合作，启动一项旨在改善代表性不足的少数民族学生的学习资本和STEM职业定位的中学年级外联计划。该职业奖支持一项实验研究和教育计划，利用最先进的冷原子工具箱进行光学、声子和纳米光子晶格工程，探索原子量子气体中的非平衡动力学。这个CAREER项目的一个重点是探索光学晶格中原子量子气体的量子临界动力学。特别是，PI将采用一种新的实验方案来访问超流体-莫特绝缘体的量子临界点，使各种方法能够探索迄今为止仍然难以捉摸的临界热力学和输运问题。此外，PI将探索准粒子控制，在超流体量子气体中设计声子带隙晶体，可以抑制声子输运，就像固体晶体中电子带隙对电子的作用一样。它可以被设计成操纵超流体样品中的热和熵输运。PI将执行声子晶体的动态控制，因此允许探索电动力学现象的声子类似物。对于探索新型量子动力学的CAREER项目的长期目标，PI将致力于进一步整合超冷原子和纳米光子晶格，形成一种设计混合材料，其中原子表面卡西米尔-波尔德相互作用为进入新的量子动力学体系提供了深亚波长晶格潜力。该项目的成功将提高我们对量子临界动力学的理解，为声子带隙材料中的量子输运提供有价值的见解，并有可能通过设计混合量子材料观察到意想不到的新量子现象。本研究计划所涉及的广泛实验技术将为研究生和本科生提供坚实的研究训练。此外，该项目将与普渡大学物理与天文学外联办公室合作，启动一项二年级外联计划，旨在改善代表性不足的少数民族学生的学习资本和STEM职业定位。该奖项反映了美国国家科学基金会的法定使命，并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。