Atomic ensembles entangled by light for measurements below the standard quantum limit

被光纠缠的原子系综用于低于标准量子极限的测量

• 批准号: 0855052
• 负责人: Vladan Vuletic
• 金额: $ 42万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2012-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0855052&HistoricalAwards=false
• 关键词: Atomic; ensembles; entangled; light; measurements; Atomic; ensembles; entangled; light; measurements

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).Atomic clocks are the most accurate devices ever made by mankind, and have many important technological applications. The best atomic clocks are currently limited by quantum mechanical uncertainties, namely random fluctuations around a well defined value that constitutes the clock signal. However, it is possible to implement quantum mechanical correlations between atoms to reduce those fluctuations, and improve clock performance. While modest improvements have already been demonstrated in previously funded work, the work performed under this grant will demonstrate an improvement in clock performance by a factor of ten.This research program funded by NSF could significantly improve the precision of the emerging best clock technology, optical-transition atomic clocks. Those clocks have the potential to reach a breathtaking accuracy of one part in ten to the seventeenth, or 0.1 microseconds compared to the age of the universe. Research and educational goals will be united by training graduate students, and by integrating undergraduate students and exceptional high-school students into the research effort. Particularly for undergraduate students, firsthand experimental experience with quantum mechanical objects provides an important, motivating and rewarding educational component. This program will contribute to increase the participation of women (currently three of seven graduate students) and minorities (currently one graduate student).

该奖项是根据2009年的《美国回收与再投资法》（公法111-5）资助的。原子钟是人类有史以来最准确的设备，并且具有许多重要的技术应用。目前，最好的原子钟最佳时钟受量子机械不确定性的限制，即围绕构成时钟信号的良好定义值周围的随机波动。但是，可以在原子之间实现量子机械相关性，以减少这些波动并提高时钟性能。 尽管在先前资助的工作中已经证明了适度的改进，但根据该赠款所做的工作将证明时钟性能的提高了十倍。这项由NSF资助的研究计划可以显着提高新兴最佳时钟技术，光学转换原子时钟的精确度。与宇宙年龄相比，这些时钟有可能达到十到十七的一部分的令人叹为观止的精度，即0.1微秒。研究和教育目标将由培训研究生，并将本科生和杰出的高中生纳入研究工作而团结。特别是对于本科生而言，量子机械对象的第一手实验经验提供了一个重要的，激励和有益的教育组成部分。该计划将有助于增加妇女（目前七名研究生中的三名）和少数民族（目前一名研究生）的参与。