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Topology, Singularities and Emulation in a Spinor BEC

旋量 BEC 中的拓扑、奇点和仿真

基本信息

批准号：
1708008
负责人：
Nicholas Bigelow
金额：
$ 31.6万
依托单位：
University of Rochester
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-09-01 至 2021-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1708008&HistoricalAwards=false
关键词：
Topology Singularities Emulation Spinor BEC

项目摘要

A frontier of modern physics involves the manipulation and study of atoms cooled and trapped with temperatures near zero degrees Kelvin. Dilute samples of cold atoms have been used to realize high-performance atomic clocks and deBroglie wave gyroscopes as well as to model novel quantum materials. This project is based on the use of such ultracold quantum-atomic vapors to simulate and emulate problems from a range of subfields of physics. The importance of this work includes contributions to the general progress of science and specifically to our understanding of the quantum world. A key impact is expected to be the creation of knowledge useful for the development of quantum technologies and understanding of novel materials. Of equal importance is that the research will be central to the training of the next generation of scientists, many of whom will form the taskforce that is necessary to develop these new technologies.The project team uses carefully prepared laser pulses to manipulate a quantum degenerate gas of rubidium in such a way that its subsequent behavior models physical phenomena important to problems in other areas such as materials science and nuclear spin resonance (the phenomena at the heart of technologies such as MRI). The project rests on a series of studies related to this goal that build on the group's experience with imprinting spin and orbital angular momentum structures on a spinor Bose-Einstein condensate (BEC). Specifically the group will investigate the creation, stability and excitations of an array of non-trivial topological excitations (coreless vortices such as Skyrmions, Alice strings, phase states, etc.); to use a recently realized full Bloch BEC to gain access to a topological phase, the Gouy phase; to realize and investigate point-like defects in a spinor BEC such as the cross dis-gyration texture. The proposed work shares a common platform of experimental techniques, many of which are well developed by the group, and a common theoretical framework.

现代物理学的一个前沿领域涉及操纵和研究在零开氏度附近冷却和捕获的原子。冷原子的稀释样品已被用于实现高性能的原子钟和德布罗意波陀螺仪，以及模拟新的量子材料。这个项目是基于使用这种超冷量子原子蒸气来模拟和仿真物理学一系列子领域的问题。这项工作的重要性包括对科学的总体进步，特别是对我们理解量子世界的贡献。预计一个关键的影响是创造对量子技术的发展和对新材料的理解有用的知识。同样重要的是，这项研究将成为培养下一代科学家的核心，他们中的许多人将组成开发这些新技术所必需的特别小组。该项目小组使用精心准备的激光脉冲来操纵铷的量子简并气体，其随后的行为模拟了对材料科学和核自旋等其他领域的问题很重要的物理现象共振（MRI等技术的核心现象）。该项目依赖于与这一目标相关的一系列研究，这些研究建立在该小组在旋量玻色-爱因斯坦凝聚体（BEC）上压印自旋和轨道角动量结构的经验基础上。具体来说，该小组将调查的创建，稳定性和激励的一系列非平凡的拓扑激励（无芯涡，如Skyrmions，爱丽丝弦，相态等）;利用最近实现的全Bloch BEC获得对拓扑相Gouy相的访问;实现并研究旋量BEC中的点状缺陷，例如交叉反旋织构。拟议的工作共享一个共同的实验技术平台，其中许多是由该小组开发的，以及一个共同的理论框架。