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arXiv physics/0407021physics.atom-phphysics.optics
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窄线冷却与动量空间晶体

Narrow Line Cooling and Momentum-Space Crystals

Thomas H. Loftus, Tetsuya Ido, Martin M. Boyd, Andrew D. Ludlow, Jun Ye

摘要:

窄谱线激光冷却正在推进从基础原子物理学研究到高精度光学频率标准的实验前沿。在本文中,我们提出了一个广泛的描述的系统和必要的技术,实现689 nm 1 S 0 - 3 P1窄线冷却的原子88 Sr。窄线冷却和捕获动力学也进行了详细研究。通过控制功率展宽跃迁线宽和单光子反冲频移的相对大小,我们表明,它是可能的连续桥接半经典和量子力学冷却之间的差距。新的半经典冷却过程,其中一些是密切相关的重力,也进行了探讨。此外,对于以上的原子共振调谐的激光频率,我们证明动量空间晶体包含多达26个明确定义的晶格点。重力辅助冷却也可以用蓝色失谐光来实现。理论上,我们发现蓝失谐动力学是普遍的多普勒限制系统。本文对窄谱线激光冷却作了迄今为止最全面的研究。

英文摘要:

Narrow line laser cooling is advancing the frontier for experiments ranging from studies of fundamental atomic physics to high precision optical frequency standards. In this paper, we present an extensive description of the systems and techniques necessary to realize 689 nm 1S0 - 3P1 narrow line cooling of atomic 88Sr. Narrow line cooling and trapping dynamics are also studied in detail. By controlling the relative size of the power broadened transition linewidth and the single-photon recoil frequency shift, we show that it is possible to continuously bridge the gap between semiclassical and quantum mechanical cooling. Novel semiclassical cooling process, some of which are intimately linked to gravity, are also explored. Moreover, for laser frequencies tuned above the atomic resonance, we demonstrate momentum-space crystals containing up to 26 well defined lattice points. Gravitationally assisted cooling is also achieved with blue-detuned light. Theoretically, we find the blue detuned dynamics are universal to Doppler limited systems. This paper offers the most comprehensive study of narrow line laser cooling to date.

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