论文标题
$^{87} $ rb使用5S $ _ {1/2} \ rightarrow $ 6p $ _ {3/2} $在420 nm处开放过渡
Narrow-line cooling of $^{87}$Rb using 5S$_{1/2} \rightarrow$ 6P$_{3/2}$ open transition at 420 nm
论文作者
论文摘要
狭窄（弱）过渡时的磁光陷阱（MOT）提供较低的温度，因此是高相密度原子云的产生的关键，随后量子退化为许多元素的原子数量高。在本文中，我们使用780 nm（ir）的宽周期过渡在420 nm处的狭窄开放过渡在420 nm处进行了$^{87} $ rb原子的加载。蓝色过渡的总线宽为5S $ _ {1/2} \ rightArow $ 6p $ _ {3/2} $是1.4 MHz，比标准5S $ _ {1/2} \ rightArrow $ 4倍窄约4倍，左右左右。使用这种狭窄的过渡，我们以MOT的$ 10^{8} $原子捕获，典型温度约为$ 54〜μ $ k。我们还研究了蓝色MOT的行为，具有各种参数，例如保持时间，诱捕和偏重梁的功能。
Magneto-optical trap (MOT) at narrow (weak) transition offers lower temperature and hence is the key for production of high phase density atomic cloud and subsequently quantum degeneracy with high number of atoms for many elements. In this paper, we describe loading of $^{87}$Rb atoms in the MOT using a narrow open transition at 420 nm from the routinely implemented MOT using broad cyclic transition at 780 nm (IR). The total linewidth of the blue transition, 5S$_{1/2} \rightarrow $ 6P$_{3/2}$ is 1.4 MHz, which is around 4 times narrower than the standard 5S$_{1/2} \rightarrow$ 5P$_{3/2}$ cyclic transition. Using this narrow transition, we have trapped around $10^{8}$ atoms in the MOT with a typical temperature of around $54~μ$K. We have also studied the behavior of the blue MOT with various parameters such as hold time, detuning and power of trapping and repumper beams.
