Novel Quantum Phase Transitions and Non-Equilibrium Dynamics in Lattice-Confined Spinor Condensates

晶格限制旋量凝聚中的新型量子相变和非平衡动力学

• 批准号: 1912575
• 负责人: Yingmei Liu
• 金额: $ 36.35万
• 依托单位: Oklahoma State 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: 2019-09-01 至 2022-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1912575&HistoricalAwards=false
• 关键词: Novel; Quantum; Phase; Transitions; Non; Novel; Quantum; Phase; Transitions; Non

This project is targeted towards applying a sodium spinor Bose-Einstein condensate (BEC) to study the interplay and applications of superfluidity, strong correlations, and quantum magnetism. BECs are ultra-cold gases in which all atoms have a single collective wavefunction for their spatial degrees of freedom. With an additional spin degree of freedom, these BECs constitute a fascinating collective quantum system offering an unprecedented degree of control over such parameters as spin, density, temperature, and the dimensionality of the system. The aims of this project are both of fundamental interest for advancing our understanding of quantum physics, and of technological significance. Beyond these specific research goals, this project provides opportunities to integrate research and teaching by involving undergraduate and graduate students in research projects. The principal investigator (PI) will endeavor to broaden the participation of under-represented groups, including Native American students, women in physics, and potential "first-generation" college students. The PI will organize workshops for local high school teachers and their students to get hands-on experience with state-of-the-art laser cooling techniques, and to develop physics projects matched to the students' level. This project will enhance the infrastructure for science education in the region and encourage more students to pursue a career in science.This project will perform important studies on an antiferromagnetic sodium spinor BEC confined in three-dimensional optical lattices and microwave dressing fields, i.e., investigate the dynamics of first-order superfluid to Mott-insulator quantum phase transitions, reveal a quantum-phase-revival spectroscopy driven by a competition between spin-dependent and spin-independent interactions, precisely determine various scattering lengths of spinor gases, and demonstrate an experimental signature of spin-dependent three-body interactions. Advantages provided by a bichromatic optical super-lattice will also be explored.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.

该项目旨在应用钠纺纱剂玻璃晶冷凝水（BEC）来研究超流体，强相关性和量子磁性的相互作用和应用。 BEC是超冷气体，其中所有原子都具有单一的集体波函数，以便其空间自由度。这些BEC具有额外的自旋程度，构成了一个引人入胜的集体量子系统，该系统可对诸如旋转，密度，温度和系统尺寸等参数的前所未有的控制程度。该项目的目的既是促进我们对量子物理学的理解的基本兴趣，又具有技术意义。除了这些特定的研究目标外，该项目还提供了通过参与研究项目的本科生和研究生来整合研究和教学的机会。首席研究员（PI）将努力扩大代表性不足的群体的参与，包括美国原住民学生，物理女性和潜在的“第一代”大学生。 PI将为当地高中老师及其学生组织研讨会，以获得最先进的激光冷却技术的动手经验，并开发与学生水平相匹配的物理项目。该项目将增强该地区科学教育的基础架构，并鼓励更多的学生从事科学职业。该项目将对抗空力磁性钠旋转器BEC进行重要研究，该研究仅限于三维光学晶格和微波敷料领域，即研究一阶超级量子的动力学量子量 - 量子 - 量子量 - 量子 - 量等量相位量 - 在旋转依赖性和自旋依赖性相互作用之间的竞争中，精确地确定了旋转气体的各种散射长度，并证明了旋转依赖性三体相互作用的实验特征。两次光学超级晶格提供的优势也将得到探索。该奖项反映了NSF的法定任务，并使用基金会的知识分子优点和更广泛的影响标准，被认为值得通过评估来获得支持。