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arXiv 2101.07544physics.atom-phcond-mat.quant-gasphysics.optics
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快速有效地制备一维链和密集的冷原子云

Fast and efficient preparation of 1D chains and dense cold atomic clouds

Antoine Glicenstein, Giovanni Ferioli, Ludovic Brossard, Yvan R. P. Sortais, Daniel Barredo, Florence Nogrette, Igor Ferrier-Barbut, Antoine Browaeys

摘要:

我们报告了一种新的实验平台,利用高效快速($\sim 2\mathrm{Hz}$)制备随机加载的单个$^{87}$ Rb原子的一维链和光镊中捕获的致密原子云。该平台旨在研究自由空间中的结构和无序原子系统。它由两个相互垂直的高分辨率光学系统组成,增强了观察和操作能力。该装置包括一个动态可控的望远镜,我们使用它来改变镊子束腰。D1 $Λ$增强的灰色糖蜜增强了来自磁光阱的陷阱的负载。使用这些工具,我们准备链的$\sim 100$原子分离的$\sim 1 \mathrm{μm}$通过逆反射的镊子光,从而产生一个1D的光晶格具有很强的横向限制。通过对初始云的压缩,获得了峰值密度高达$n_0 = 10^{15}\:\mathrm{at}/\mathrm{cm}^3$的致密原子云。这种高密度导致原子间距离小于D2光学跃迁的$λ/(2π)$,使其成为研究致密样品中光诱导相互作用的理想选择。

英文摘要:

We report the efficient and fast ($\sim 2\mathrm{Hz}$) preparation of randomly loaded 1D chains of individual $^{87}$Rb atoms and of dense atomic clouds trapped in optical tweezers using a new experimental platform. This platform is designed for the study of both structured and disordered atomic systems in free space. It is composed of two high-resolution optical systems perpendicular to each other, enhancing observation and manipulation capabilities. The setup includes a dynamically controllable telescope, which we use to vary the tweezer beam waist. A D1 $Λ$-enhanced gray molasses enhances the loading of the traps from a magneto-optical trap. Using these tools, we prepare chains of up to $\sim 100$ atoms separated by $\sim 1 \mathrm{μm}$ by retro-reflecting the tweezer light, hence producing a 1D optical lattice with strong transverse confinement. Dense atomic clouds with peak densities up to $n_0 = 10^{15}\:\mathrm{at}/\mathrm{cm}^3$ are obtained by compression of an initial cloud. This high density results into interatomic distances smaller than $λ/(2π)$ for the D2 optical transitions, making it ideal to study light-induced interactions in dense samples.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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