Precision Measurements with Polarized Spins

通过极化旋转进行精确测量

基本信息

批准号：
1068876
负责人：
Ronald Walsworth
金额：
$ 30万
依托单位：
Smithsonian Institution Astrophysical Observatory
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2011
资助国家：
美国
起止时间：
2011-09-15 至 2014-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1068876&HistoricalAwards=false
关键词：
Precision Measurements Polarized Spins

项目摘要

This research program is aimed at performing precision co-magnetometry using atomic physics tools to enable sensitive searches for new physics beyond the Standard Model of particle physics. These experiments will employ a dual-species maser operating simultaneously with optically-pumped Xenon-129 and Helium-3 gas. By using one of the noble-gas masers as a co-magnetometer, and stabilizing its maser frequency by comparison to an atomic clock, one can precisely control the magnetic field environment of the second noble-gas maser and then employ this maser as a very sensitive sensor for new physics that couples to the noble gas nucleus, with no significant contribution from the atomic electrons. The experiments to be carried out include a sensitive test of Lorentz symmetry (one of the fundamental aspects of the theory of relativity) and CPT (Charge conjugation, Parity, and Time reversal) symmetry for the neutron.Broader impacts of the program include the application of the atomic physics based precision measurement techniques of this research into the development of novel tools for magnetometry and bioimaging. Magnetic resonance imaging (MRI) at low magnetic fields of hyperpolarized noble gas inhaled into human lungs and atom-like Nitrogen Vacancy (NV) color centers in diamond, which may provide sensitive magnetometers to monitor electromagnetic activity in neuronal networks, are two examples.

该研究计划旨在使用原子物理工具进行精密共磁测量，以便能够灵敏地搜索超出粒子物理标准模型的新物理。这些实验将采用与光泵浦 Xenon-129 和 Helium-3 气体同时运行的双物质微波激射器。通过使用其中一个惰性气体脉泽作为共磁强计，并通过与原子钟的比较来稳定其脉泽频率，可以精确控制第二个惰性气体脉泽的磁场环境，然后将该脉泽用作非常好的磁力计。用于与惰性气体核耦合的新物理的敏感传感器，原子电子没有显着贡献。即将进行的实验包括对中子洛伦兹对称性（相对论的基本方面之一）和 CPT（电荷共轭、宇称和时间反转）对称性的敏感测试。该计划的更广泛影响包括应用这项研究基于原子物理学的精密测量技术，用于磁力测量和生物成像新型工具的开发。吸入人体肺部的超极化惰性气体和钻石中的类原子氮空位（NV）色心的低磁场下的磁共振成像（MRI）是两个例子，这可以提供灵敏的磁力计来监测神经网络中的电磁活动。