Dynamics Within Atoms in Intense Electromagnetic Fields (Physics)

强电磁场中原子内的动力学（物理）

• 批准号: 8809091
• 负责人: James Bayfield
• 金额: $ 42.26万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-08-15 至 1992-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8809091&HistoricalAwards=false
• 关键词: Dynamics; Within; Atoms; Intense; Electromagnetic

Experimental studies will be carried out on the quantum dynamics of classically chaotic quantum diffusion. The quantum system to be utilized is the nearly one dimensional highly excited hydrogen atom in intense microwave and static electric fields. This semiclassical system is a prototype for atoms in intense electromagnetic radiation fields. As such, the research pertains to atomic processes induced by very intense optical fields. The measurements involve the passage of a fast laser excited atomic hydrogen beam through a microwave waveguide structure, to produce a microwave pulse in each atom's reference frame. Measured will be final bound state probability distributions and ionization probabilities. Other topics studied include research on the quantum suppression of diffusion in action space, the measurement of quantum diffusion constants and breakpoint times, classical and quantum resonance effects, static field quantum tunneling enhancement of quantum diffusion, and the effects of stochastic microwave fields.

将对经典混沌量子扩散的量子动力学进行实验研究。所要利用的量子系统是强微波和静电场中的近一维高激发氢原子。这个半经典系统是强电磁辐射场中原子的原型。因此，这项研究涉及由非常强烈的光场诱导的原子过程。测量包括快速激光激发的原子氢光束通过微波波导结构，在每个原子的参考系中产生微波脉冲。测量的将是最终束缚态几率分布和电离几率。其他研究课题包括作用空间中扩散的量子抑制、量子扩散常数和断点时间的测量、经典和量子共振效应、量子扩散的静电场量子隧道增强以及随机微波场的效应。