Studies in atom and molecule manipulation

原子和分子操纵研究

• 批准号: 0400866
• 负责人: Mark Kasevich
• 金额: --
• 依托单位: Stanford University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-01 至 2009-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0400866&HistoricalAwards=false
• 关键词: Studies; atom; molecule; manipulation

This project is a continuation of the development of accurate atom interferometers for precision measurements. The determination of h/M, Planck's constant divided by the mass of the atom in the interferometer, will be improved by approximately one order of magnitude from its current accuracy. This will lead to a determination of the fine structure constant alpha with an uncertainty of ~ 0.5 parts per billion. In addition, many particle phenomena of Bose condensed atoms in optical lattices will be studied. Specifically, the creation of non-zero angular momentum states in low occupancy Mott states in an optical lattice is proposed. A signature of these states would be a suppression of the central atomic interference peak upon release of the atoms from the lattice confinement. The broader impact involves the education of future professors, the application of the interferometers to inertial sensing and programs in outreach.

该项目是用于精密测量的精确原子干涉仪开发的延续。 h/M（普朗克常数除以干涉仪中原子的质量）的测定将比目前的精度提高大约一个数量级。这将导致精细结构常数 α 的确定，不确定度约为十亿分之 0.5。此外，还将研究光学晶格中玻色凝聚原子的许多粒子现象。具体来说，提出了在光学晶格中以低占据莫特态创建非零角动量态。这些状态的特征是当原子从晶格限制中释放时中心原子干涉峰受到抑制。更广泛的影响涉及未来教授的教育、干涉仪在惯性传感中的应用以及推广计划。