Coherent backscattering of light by saturated atoms

饱和原子对光的相干反向散射

基本信息

项目摘要

The present project aims at the theoretical study of coherent backscattering (CBS) of intense laser light by cold atoms. It is important to understand how quantum interference, crucial for the emergence of this phenomenon, can be affected by fundamental quantum mechanical dephasing mechanisms - such as photon spin flips or inelastic scattering. This has important consequences for the transition from weak to strong, or Anderson, localization, of light within cold atomic gases, as well as for potential technological applications, such as random lasers. Previous studies explored the dependence of the underlying interference effect on the degeneracy of the atomic dipole transitions, on residual thermal motion of the atoms, or on inelastic scattering. Concerning the latter mechanism, many fundamental questions are still unresolved, such as how higher-order scattering contributions are affected by nonlinear saturation effects, or whether CBS leaves a detectable trace in the photocount statistics. Furthermore, the combined impact of inelastic scattering together with either one of the two other dephasing mechanisms (i.e., degeneracy and thermal motion) has so far not been considered theoretically, although there are already experimental results to be matched with. To address these questions, we shall develop a non-perturbative description of the atoms-laser interaction, combining numerical approaches based on master equations for a small number of atoms with new analytical tools for treating disordered samples of many atoms. Answering them will be an important step towards the ultimate goal of this project - a theory for multiple scattering of intense laser light in cold atomic gases.
本项目旨在对强激光与冷原子的相干后向散射进行理论研究。重要的是要理解量子干涉,这一现象的出现至关重要,如何受到基本量子力学退相机制的影响-如光子自旋翻转或非弹性散射。这对于冷原子气体中光的弱到强的跃迁,或安德森局域化,以及潜在的技术应用,如随机激光器,都有重要的影响。以前的研究探讨了原子偶极跃迁的简并性,原子的残余热运动,或非弹性散射的基础干涉效应的依赖性。关于后者的机制,许多基本的问题仍然没有解决,如高阶散射的贡献是如何影响的非线性饱和效应,或CBS是否留下了可检测的痕迹,在光计数统计。此外,非弹性散射与两种其他失相机制中的任一种(即,简并和热运动),尽管已经有实验结果与之相匹配,但迄今为止还没有在理论上考虑。为了解决这些问题,我们将开发一个非微扰的原子激光相互作用的描述,结合数值方法的基础上的主方程的一个小数目的原子与新的分析工具来处理无序的样品的许多原子。对它们的研究将是朝着这个项目的最终目标迈出的重要一步--一个强激光在冷原子气体中多次散射的理论。

项目成果

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Professor Dr. Andreas Buchleitner其他文献

Professor Dr. Andreas Buchleitner的其他文献

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{{ truncateString('Professor Dr. Andreas Buchleitner', 18)}}的其他基金

Transport and entanglement of orbital angular momentum photonic states in turbulent atmosphere
湍流大气中轨道角动量光子态的传输和纠缠
  • 批准号:
    289382917
  • 财政年份:
    2015
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Matter wave spectroscopy of the many-body physics in optical lattices
光学晶格中多体物理的物质波谱
  • 批准号:
    201192159
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Research Grants
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
  • 批准号:
    193945900
  • 财政年份:
    2011
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Coherent transport of waves in disordered systems with nonlinearity and interactions
具有非线性和相互作用的无序系统中波的相干传输
  • 批准号:
    163842026
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Decay, scattering, and decoherence in many-body quanum systems
多体量子系统中的衰变、散射和退相干
  • 批准号:
    40341746
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Research Units
Spectral properties of interacting cold atoms in optical lattices
光学晶格中相互作用的冷原子的光谱特性
  • 批准号:
    5454459
  • 财政年份:
    2005
  • 资助金额:
    --
  • 项目类别:
    Priority Programmes
A Statistical Approach to Quantum Many-Body Eigenstates near Criticality: Multifractality in Hilbert Space
接近临界点的量子多体本征态的统计方法:希尔伯特空间中的多重分形
  • 批准号:
    402552777
  • 财政年份:
  • 资助金额:
    --
  • 项目类别:
    Research Grants

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Enhanced backscattering instrument for assessing optical biomarkers of glaucoma
用于评估青光眼光学生物标志物的增强型反向散射仪器
  • 批准号:
    9764362
  • 财政年份:
    2018
  • 资助金额:
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Towards Colonscopy-free Colon Cancer Screening by Enhanced Light Backscattering
通过增强光后向散射实现免结肠镜检查结肠癌筛查
  • 批准号:
    7676799
  • 财政年份:
    2007
  • 资助金额:
    --
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Towards Colonscopy-free Colon Cancer Screening by Enhanced Light Backscattering
通过增强光后向散射实现免结肠镜检查结肠癌筛查
  • 批准号:
    7497917
  • 财政年份:
    2007
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    --
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Towards Colonscopy-free Colon Cancer Screening by Enhanced Light Backscattering
通过增强光后向散射实现免结肠镜检查结肠癌筛查
  • 批准号:
    7496723
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
Towards Colonscopy-free Colon Cancer Screening by Enhanced Light Backscattering
通过增强光后向散射实现免结肠镜检查结肠癌筛查
  • 批准号:
    7128370
  • 财政年份:
    2006
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    --
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Development of instantaneous laser hemostasis on sheath removal hole after catheter intervention
导管介入术后拔鞘孔瞬时激光止血技术的研究进展
  • 批准号:
    16300177
  • 财政年份:
    2004
  • 资助金额:
    --
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Fundamental study on diffusing light topography
漫射光形貌的基础研究
  • 批准号:
    10650396
  • 财政年份:
    1998
  • 资助金额:
    --
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Development of real time monitoring for CVD thin film process by enhanced backscattering of light.
通过增强光反向散射开发实时监控 CVD 薄膜工艺。
  • 批准号:
    10650408
  • 财政年份:
    1998
  • 资助金额:
    --
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
STUDY ON ULTRA-LOW ENERGY ION IMPLANTATION USING HIGH-RESOLUTION RBS
高分辨率RBS超低能离子注入研究
  • 批准号:
    10450121
  • 财政年份:
    1998
  • 资助金额:
    --
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
Dynamics and light-scattering properties of Brownian particles in suspensions under laser radiation pressure
激光辐射压力下悬浮液中布朗粒子的动力学和光散射特性
  • 批准号:
    09450024
  • 财政年份:
    1997
  • 资助金额:
    --
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
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