Formation and Applications of Ultracold Molecules

超冷分子的形成及应用

• 批准号: 0855613
• 负责人: William Stwalley
• 金额: $ 40万
• 依托单位: University of Connecticut
• 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: 2009-08-15 至 2013-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0855613&HistoricalAwards=false
• 关键词: Formation; Applications; Ultracold; Molecules

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).This program will study the formation and applications of ultracold molecules with translational temperatures less than 0.001 K. The formation of the homonuclear molecule Rb_2 and the heteronuclear molecule KRb will be investigated by photoassociation (PA) of ultracold atoms, emphasizing two newly proposed novel variants of PA in which a long-range state of a molecule is mixed quantum mechanically with a short-range state. Either of the two variant schemes can lead to formation of molecules in their lowest energy states. These molecules, trapped in a so-called optical trap, will be examined to determine their elastic, inelastic, and chemically reactive collision rates, which are expected to be vastly different from rates extrapolated from higher temperatures. External electric and magnetic fields will be applied to observe their anticipated major influence on collision rates.The broader impacts are that it will integrate fundamental research with education at the graduate, postdoctoral, and undergraduate level through group meetings, mentoring, workshops, seminars, and collaborations. The research will have cross-disciplinary implications, including contributions to the proposed application of ultracold polar molecules for quantum information processing. Presentations and papers by the program participants will contribute to scientific understanding, including areas such as ultracold chemistry, fundamental symmetries, quantum information, and nanoscience, and to international scientific cooperation.

该奖项由2009年《美国复苏与再投资法案》(公法第111-5条)资助。该计划将研究平移温度低于0.001 K的超冷分子的形成和应用。同核分子Rb_2和异核分子KRb的形成将通过超冷原子的光缔合(PA)来研究，重点是新提出的PA的两个新变体，即分子的长程态和短程态的量子力学混合。这两种不同的方案中的任何一种都可以导致分子在其最低能量状态下形成。这些被困在所谓的光学陷阱中的分子将被检查，以确定它们的弹性、非弹性和化学反应碰撞速率，预计这些碰撞速率将与从更高温度推断的速率截然不同。外加电场和磁场将被用来观察它们对撞击率预期的主要影响。更广泛的影响是，它将通过小组会议、指导、研讨会、研讨会和合作，将基础研究与研究生、博士后和本科生的教育结合起来。这项研究将具有跨学科的影响，包括对拟议的超冷极性分子在量子信息处理中的应用做出贡献。项目参与者的演讲和论文将有助于科学理解，包括超冷化学、基本对称性、量子信息和纳米科学等领域，以及国际科学合作。