MRI: Development of a Molecular Beam Instrument for High Resolution Laser Spectroscopy and Quantum Control Studies of Molecular Systems

MRI：开发用于分子系统高分辨率激光光谱和量子控制研究的分子束仪器

• 批准号: 2018443
• 负责人: Ergin Ahmed
• 金额: $ 32.05万
• 依托单位: Temple University
• 依托单位国家: 美国
• 项目类别: Standard 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=2018443&HistoricalAwards=false
• 关键词: MRI; Development; Molecular; Beam; Instrument

The goal of this project is to develop an apparatus to produce a highly controlled beam of molecules, integrated with a precise and highly controllable laser system for the purpose of spectroscopic and quantum optics studies. This forms an instrument that will allow the study of the response of molecules to different colors of laser light in a regime where collisions and other effects (line broadening) due to the random thermal motion of the molecules are greatly suppressed. Specifically, molecules with large magnetic moments (analogous to powerful but tiny bar magnets) will be studied. Such magnetic molecules can be controlled by the laser in a way that makes them simulate unusual solid materials that are engineered to outperform naturally occurring materials. In addition, the high power provided by the instrument’s laser system will allow for the development of control mechanisms with potential applications for quantum computing.Atoms with partially filled inner shells exhibit large magnetic dipole moments which give rise to extremely large anisotropy in their interactions. Some of the best examples of such magnetic properties are found in the open f-shell lanthanides like dysprosium and erbium. Molecules formed by such atoms are expected to have even larger magnetic moments and offer novel dipolar properties. Very little is known about the electronic structure of such molecules because theoretical ab initio calculations are very challenging. The scientists carrying out this work plan to use this instrument for an experimental high-resolution spectroscopic study of the electronic structure of the lanthanide dimers. Such a spectroscopic study is important for the developing area of quantum magnetism. For molecular quantum control, the instrument’s laser system provides the electromagnetic field (light) needed to modify (‘dress’) the energy levels of a molecule. The degree of dressing of the molecular states is dependent on the intensity of the laser radiation. The high power provided by the instrument's laser system will facilitate enhanced quantum control of molecular systems. The instrument’s molecular beam provides a collision free environment with long coherence times which is not available in typical thermal samples.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.

该项目的目的是开发一种设备，以产生高度控制的分子光束，该设备与精确和高度控制的激光系统集成在一起，以进行光谱和量子光学研究。这种仪器将允许研究分子对不同颜色激光光的响应的响应，在这种状态下，由于分子的随机热运动，碰撞和其他效果（线扩展）受到了极大的抑制。具体而言，将研究具有较大磁矩（类似于功率但微小的磁铁）的分子。这样的磁分子可以通过激光器控制，以使它们模拟其设计以超越天然材料的异常固体材料。此外，仪器的激光系统提供的高功率将允许开发具有量子计算的潜在应用的控制机制。具有部分填充的内壳的原子暴露了大型磁极矩矩，从而在其相互作用中产生极大的各向异性。此类磁性特性的一些最好的例子是在开放的F-Shell灯笼中发现的，例如肾上腺疾病和Erbium。这些原子形成的分子预计将具有更大的磁矩并具有新颖的偶极性能。对于此类分子的电子结构知之甚少，因为从头开始计算非常挑战。执行此工作计划的科学家将该工具用于对灯笼二聚体电子结构的实验高分辨率光谱研究。这种光谱研究对于量子磁性的发展领域很重要。对于分子量子控制，仪器的激光系统提供了修改分子能量水平所需的电子场（光）。分子状态的敷料程度取决于激光辐射的强度。仪器激光系统提供的高功率将有助于增强分子系统的量子控制。该仪器的分子束提供了无冲突的环境，具有较长连贯的时间，这在典型的热样品中不可用。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响审查标准来评估被认为是宝贵的支持。