Ultra-accurate studies of time, quantum phenomena, and atomic physics using an isolated, laser cooled single ion system

使用隔离的激光冷却单离子系统对时间、量子现象和原子物理进行超精确研究

• 批准号: 311860-2010
• 负责人: Madej, Alan
• 金额: $ 3.28万
• 依托单位: York University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2011
• 资助国家: 加拿大
• 起止时间: 2011-01-01 至 2012-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=481016
• 关键词: Ultra; accurate; studies; time; quantum

The proposed research program uses a unique national experimental facility where measurements of fundamental physical phenomena, atomic structure, quantum phenomena are perfomed at the limits of current physical measurement and form the potential basis for the next generation realization of atomic based time and frequency. The focus for the studies are centered on the use of a single, trapped and isolated atomic ion which is slowed down in its motion using laser radiation and probed using an laser source having Hz level linewidths at operating frequencies of 445 THz. The system forms the heart of an optical atomic clock which has the potential to outperform the best current realizations of the SI second using the Cs atomic clock transition. Experiments are proposed which investigate the distortion of time by earth's gravity field and can sense these changes by metre level displacements of the clock system. The experiment will also be used in sensitive measurements to see if some of the fundamental constants in nature have truly fixed values or vary with time.

本研究计划使用独特的国家实验设备，在当前物理测量的极限下进行基本物理现象，原子结构，量子现象的测量，并形成下一代实现基于原子的时间和频率的潜在基础。研究的重点集中在使用一个单一的、被捕获的和孤立的原子离子，它在运动中使用激光辐射减慢，并在445太赫兹的工作频率下使用具有Hz级线宽的激光源进行探测。该系统构成了光学原子钟的核心，具有超越目前使用Cs原子钟跃迁的最佳SI秒实现的潜力。提出了研究地球重力场对时间的扭曲的实验，并可以通过时钟系统的米级位移来感知这些变化。该实验还将用于敏感测量，以观察自然界中的一些基本常数是否具有真正固定的值，还是随时间变化。