Theoretical Investigation of Ultracold Few-Body Collisions

超冷少体碰撞的理论研究

• 批准号: 0555676
• 负责人: Brett Esry
• 金额: --
• 依托单位: Kansas State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-08-01 至 2010-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0555676&HistoricalAwards=false
• 关键词: Theoretical; Investigation; Ultracold; Few; Body

Significant theoretical progress has been made in recent years on the problem of three neutral atoms colliding at ultracold temperatures. The dependence of the associated elastic and inelastic rate coefficients on energy, mass, and scattering length is known for many combinations of identical bosons and identical fermions. Importantly, though, the behavior of the rates near Feshbach resonances, which are now used in nearly every experiment involving ultracold atoms, is not known for the majority of these systems. Moreover, three-body collisions are only growing in importance experimentally. This project will address many general theoretical issues of ultracold few-body collisions, and their behavior near a Feshbach resonance.

近几年来，中性三原子碰撞问题的理论研究取得了重要进展。对于许多相同玻色子和相同费米子的组合，相关的弹性和非弹性速率系数对能量、质量和散射长度的依赖性是已知的。然而，重要的是，费什巴赫共振附近的速率行为，现在几乎在所有涉及超冷原子的实验中使用，对于大多数这些系统来说都是未知的。此外，三体碰撞的重要性只是在实验上有所增加。这个项目将解决许多一般性的超冷少体碰撞的理论问题，以及它们在费什巴赫共振附近的行为。