Improved tests of Lorentz and CPT symmetry using noble gas and hydrogen masers

使用惰性气体和氢脉泽改进洛伦兹和 CPT 对称性测试

• 批准号: 0502279
• 负责人: Ronald Walsworth
• 金额: --
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-09-01 至 2009-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0502279&HistoricalAwards=false
• 关键词: Improved; tests; Lorentz; CPT; symmetry

This experimental research program is aimed at performing improved tests of Lorentz and CPT symmetry of the neutron and the proton using a noble gas (129Xe/3He) Zeeman maser and a hydrogen maser, respectively. In the proposed three-year program the PI will optimize the performance of the upgraded 129Xe/3He and hydrogen masers; perform long-term monitoring (more than one year) of maser (i.e., spin precession) frequencies; characterize possible systematic effects; and analyze and present the results of these measurements. The expected result of this study is unprecedented sensitivity to possible effects of quantum gravity such as an anisotropy or non-commutativity of space-time, and to the coupling of neutrons and protons to a time-varying cosmological scalar field, which is a leading candidate for dark energy. The broader impact of the program involves student education as well as applications, including MRI at low magnetic fields of hyperpolarized noble gas inhaled into human lungs for studies of basic pulmonary physiology and diseases such as asthma and emphysema.

该实验研究计划旨在分别使用高贵气体（129xe/3he）Zeeman Maser和氢maser进行改进的中子和质子的CPT对称性测试。 在拟议的三年计划中，PI将优化升级的129xE/3HE和氢mas的性能；对MASER（即旋转进动）频率进行长期监控（超过一年）；表征可能的系统效应；并分析并提出这些测量结果的结果。 这项研究的预期结果是对量子重力的可能影响（例如各向异性或时空的非交换性）以及中子和质子与时间变化的宇宙学标量场的耦合的敏感性，这是一个领先的领先候选者用于暗能量。该计划的更广泛的影响涉及学生教育和应用，包括在超极化贵族气体的低磁场上吸入人类肺部的MRI，以研究基本的肺部生理学和疾病，例如哮喘和肺气肿。