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Nematic and Magnetic Behavior of Spin-1 Bose-Einstein Condensates

Spin-1 玻色-爱因斯坦凝聚体的向列和磁性行为

基本信息

批准号：
2011478
负责人：
Chandra Raman
金额：
$ 55.71万
依托单位：
Georgia Tech Research Corporation
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：
2020-09-01 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2011478&HistoricalAwards=false
关键词：
Nematic Magnetic Behavior Spin Bose

项目摘要

General audience abstract: Most waves—from those traveling in water, to radio waves used for communication—naturally spread out, or disperse, when traveling over a long enough distance. Solitons are a special category of wave that does not experience dispersion, and which therefore maintain its shape while propagating. Solitons occur naturally in the world, from water waves to biological systems, and have even existed in the early universe. If the medium is an optical fiber, then the resulting waves are optical solitons, whose nonspreading ability has technological relevance for sending optical pulses over long distances for communication. The solitons created in quantum systems such as atomic Bose-Einstein condensates have unique aspects, including the potential for quantum communication and computation. This project will discover how to make such quantum solitons in Bose-Einstein condensates in a careful and controlled manner in order to answer questions such as when do solitons form bound pairs and what is the collective behavior of large numbers of solitons that interact with one another. By answering such questions, we may come closer to finding practical applications for solitons. In addition to conducting this laboratory research, the PI will reach out to the Atlanta K-12 community through summer internships for local high school teachers. Graduate student teaching and training will continue to be emphasized, as will exposure of undergraduates to research. Technical audience abstract: Experiments will be performed that create and control magnetic solitons and related structures in sodium spinor Bose-Einstein condensates. These unique solitons, which exist only for antiferromagnetic interactions, were first predicted theoretically in 2016, and were recently observed experimentally. They are a type of vector soliton existing in a quantum fluid with multiple components in the non-Manakov limit of the nonlinear Schrodinger equation. Bose-Einstein condensates, with a rich panoply of internal hyperfine levels, or spin components, are a unique platform for exploring these solitary waves. Digital micromirror devices will be used to carefully control the soliton placement and dynamical evolution, with the goal of observing soliton bound states and other ordered structures. The research connects atomic physics to nonlinear science, optics and condensed matter. Scientific collaborations established in the previous funding cycle will be continued and strengthened.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.

一般观众摘要：大多数波--从水中传播的波到用于通信的无线电波--在传播足够长的距离时自然地散开或分散。孤子是一种特殊的波，它不经历色散，因此在传播时保持其形状。孤立子在世界上自然存在，从水波到生物系统，甚至在早期宇宙中就已经存在。如果介质是光纤，则产生的波是光孤子，其不扩散能力与长距离发送光脉冲进行通信具有技术相关性。在量子系统中产生的孤子，如原子玻色-爱因斯坦凝聚体，具有独特的方面，包括量子通信和计算的潜力。该项目将发现如何以谨慎和受控的方式在玻色-爱因斯坦凝聚体中制造这种量子孤子，以回答诸如孤子何时形成束缚对以及相互作用的大量孤子的集体行为是什么等问题。通过回答这些问题，我们可能更接近于发现孤子的实际应用。除了进行这项实验室研究外，PI还将通过当地高中教师的暑期实习接触亚特兰大K-12社区。研究生的教学和培训将继续受到重视，本科生接触研究也将继续受到重视。技术观众摘要：将进行实验，创造和控制磁孤子和相关结构的钠旋玻色爱因斯坦凝聚。这些独特的孤子只存在于反铁磁相互作用中，于2016年首次在理论上预测，最近在实验上观察到。它们是存在于多分量量子流体中的一类非线性薛定谔方程非Manakov极限的矢量孤子。玻色-爱因斯坦凝聚体具有丰富的内部超精细能级或自旋分量，是探索这些孤立波的独特平台。利用数字化的微扰器件，对孤子的位置和动力学演化进行精细控制，以观测孤子的束缚态和其他有序结构。这项研究将原子物理学与非线性科学、光学和凝聚态物质联系起来。该奖项反映了NSF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。