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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.

冷原子是一种前所未有的具有可控光学特性的单分散无序介质。这使得冷原子非常适合研究基本无序诱导的干涉效应，如相干后向散射（CBS）和光的安德森局域化，以及在随机激光器中的应用。如果干扰多重散射波之间的相干性被破坏，这些干扰效应可以被破坏。对于量子散射体，两种最相关的消相机制是简并原子跃迁上的拉曼散射和多光子散射。目前的项目旨在进一步发展“泵-探针”形式，该形式迄今为止已为两个标量原子制定。泵-探针方法综合了主方程和图解散射理论方法的潜力，因此是处理稀原子介质中饱和原子的多重散射的一种很有前途的方法。在本项目中，我们将推广泵-探针形式，以处理矢量原子的多次散射。由此产生的来自冷原子的强激光的多重散射理论将允许与现有实验进行定量比较。此外，它将使我们能够对CBS的量子统计特征进行定量预测。