AMO Physics in Parahydrogen Matrices

仲氢基质中的 AMO 物理

• 批准号: 1607072
• 负责人: Jonathan Weinstein
• 金额: $ 47万
• 依托单位: Board of Regents, NSHE, obo University of Nevada, Reno
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-08-15 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1607072&HistoricalAwards=false
• 关键词: AMO; Physics; Parahydrogen; Matrices

Atoms and molecules in the gas phase are currently used in many applications: the world's most accurate clocks, sensors, and prototype quantum computers. Many of these applications would greatly benefit from higher numbers and densities of the atoms and molecules used. This can be achieved by implanting the atoms or molecules of interest within a solid. Unfortunately, most solids alter the properties of implanted atoms or molecules to such an extent that they are no longer experimentally useful. One promising exception to this rule is solid parahydrogen: a cryogenic crystal of hydrogen molecules prepared in a purified nuclear spin state. This "quantum solid" preserves many of the important properties of implanted atoms and molecules. This project will investigate the properties of parahydrogen relevant for atomic physics applications, and combine the powerful tools of atomic and molecular physics with the high numbers and densities that can only be achieved in the solid phase. This has the potential to advance applications such as magnetometry, molecular structure imaging, and fundamental physics tests.This experimental physics research program will measure the optical pumping properties of atoms implanted in solid parahydrogen, and measure spin relaxation and coherence times. These are crucial parameters for magnetometry applications. A survey of atomic dopants and crystal parameters will be conducted to find favorable conditions and help to understand the underlying physics. The behavior of implanted polar molecules, specifically the ability to use external fields to orient the molecules, will be studied. This is not only of interest for understanding the interaction of molecules with their parahydrogen host, but also a crucial first step for proposals to search for an electric dipole moment using heavy polar molecules in the solid phase.

目前在许多应用中使用了气相中的原子和分子：世界上最准确的时钟，传感器和原型量子计算机。这些应用中的许多将大大受益于所使用的原子和分子的密度。这可以通过在固体中植入感兴趣的原子或分子来实现。不幸的是，大多数固体会改变植入原子或分子的特性，以至于它们不再在实验上有用。该规则的一个有前途的例外是固体寄生虫：在纯化的核自旋状态下制备的氢分子的低温晶体。这种“量子固体”保留了植入原子和分子的许多重要特性。该项目将研究与原子物理应用相关的寄生虫的特性，并将原子和分子物理学的强大工具与仅在固相中可以实现的高数量和密度相结合。这具有推进应用的潜力，例如磁力测定法，分子结构成像和基本物理测试。本实验物理研究计划将测量植入固体寄生虫原子的光学泵浦特性，并测量自旋松弛和相干时间。这些是用于磁力测定应用的关键参数。将对原子掺杂剂和晶体参数进行调查，以找到有利的条件并有助于了解潜在的物理学。将研究植入的极性分子的行为，特别是使用外部场来定向分子的能力。这不仅是理解分子与寄生虫宿主的相互作用的兴趣，而且是提议在固相中使用重的极性分子搜索电偶极力矩的关键第一步。

项目成果

Spin coherence and optical properties of alkali-metal atoms in solid parahydrogen

• DOI: 10.1103/physreva.100.063419
• 发表时间: 2019-10
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: S. Upadhyay;Ugne Dargyte;V. D. Dergachev;R. Prater;S. Varganov;T. Tscherbul;D. Patterson;J. Weinstein