Pump-probe approach to multiple scattering of intense laser light from cold atoms

泵浦探针方法对来自冷原子的强激光进行多次散射

基本信息

批准号：
193945900
负责人：
Professor Dr. Andreas Buchleitner
金额：
--
依托单位：
Arbeitsgruppe Quantenoptik und -statistik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2013-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/193945900?language=en
关键词：
Pump probe approach multiple scattering

项目摘要

Cold atoms is an unprecedented example of a monodisperse disordered medium with controllable optical properties. This makes cold atoms highly suitable for studies of fundamental disorder-induced interference effects alike coherent backscattering (CBS) and Anderson localization of light, as weIl as for applications in random lasers. These interference effects can be destroyed if coherence between the interfering multiple scattering waves is broken. For quantum scatterers, the two most relevant dephasing mechanisms are Raman scattering on degenerate atomic transitions, on the one hand, and multi-photon scattering, on the other hand.The present project is aimed at a further development of the "pump-probe" formalism which has so far been worked out for two scalar atoms. The pump-probe approach synthesizes the potentials of the master equation and diagrammatic scattering theory approaches, and is hence a promising approach for treating multiple scattering from saturated atoms in a dilute atomic medium. Within the present project, we will generalize the pump-probe formalism in order to treat multiple scattering by vector atoms. The resulting multiple scattering theory of intense laser light from cold atoms will allow a quantitative comparison with existing experiments. Besides, it will enable us to make quantitative predictions concerning the quantum statistical signatures of CBS.

冷原子是具有可控光学特性的单分散无序培养基的前所未有的例子。这使得冷原子非常适合研究基本障碍诱导的干扰效应，相干反向散射（CBS）和Anderson光的定位，就像在随机激光器中的应用一样。如果干扰多个散射波之间的连贯性被打破，则可以破坏这些干扰效应。对于量子散射器，另一方面，两种最相关的脱位机制是在退化的原子过渡上的拉曼散射，另一方面是多光子散射。另一方面，目前的项目旨在进一步开发“泵探针”形式主义，到目前为止，这两个标量量表都在两个标量表中进行了处理。泵浦探针方法综合了主方程和图形散射理论方法的电势，因此是一种在稀介质中从饱和原子中处理多个散射的有前途的方法。在本项目中，我们将概括泵探针形式主义，以便对向量原子进行多个散射。产生的多种散射理论来自冷原子的激光激光将允许与现有实验进行定量比较。此外，这将使我们能够对CBS的量子统计签名做出定量预测。