Ionic, Atomic and Molecular Physics

离子、原子和分子物理学

• 批准号: 9514795
• 负责人: David Pritchard
• 金额: $ 81.14万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-05-15 至 1999-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9514795&HistoricalAwards=false
• 关键词: Ionic; Atomic; Molecular; Physics

This research program emphasizes two different aspects of precision measurements. In the first the approach of atom interferometry will be used to determine atomic and molecular properties such as polarizabilities and to study fundamental quantum phenomena such as Aharonov-Casher and Berry's phases. Simultaneously, the potential use of atom interferometry in inertial sensing will be explored, where there exists the possibility, because of its enhanced sensitivity, that it could replace the laser gyroscope. In the second a new approach to ultra-precision mass measurements will be further developed. This technique will exploit the simultaneous determination of the cyclotron frequency of two ions in a trap in order to remove errors in the mass measurements associated with magnetic field determinations. Results of the research in both areas have implications beyond the narrow area of AMO physics. Extremely precise polarizability measurements for cesium will check atomic structure calculations required for analyzing measurements of parity violation in the atom; extremely precise measurements of the mass difference between 3H and 3He could help place bounds on the mass of the neutrino.

该研究计划强调精密测量的两个不同方面。 在第一个原子干涉的方法将被用来确定原子和分子的性质，如极化率和研究基本的量子现象，如阿哈罗诺夫-卡什和贝瑞的阶段。与此同时，将探讨原子干涉测量法在惯性传感方面的潜在用途，由于其灵敏度提高，有可能取代激光陀螺仪。 在第二个项目中，将进一步开发超精密质量测量的新方法。该技术将利用阱中两个离子的回旋频率的同时测定，以消除与磁场测定相关的质量测量中的误差。 这两个领域的研究结果都超出了AMO物理学的狭窄领域。 铯的极精确极化率测量将检查原子结构计算，以分析原子中宇称违反的测量结果; 3 H和3 He之间质量差的极精确测量可以帮助确定中微子质量的界限。