Sub-Doppler cooling of sodium atoms in gray molasses
Sub-Doppler cooling of sodium atoms in gray molasses
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DOI：
10.1103/physreva.93.023421
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发表时间：
2016-02-18
影响因子：
2.9
通讯作者：
Ferrari, Gabriele
中科院分区：
文献类型：
--
作者：
Colzi, Giacomo;Durastante, Gianmaria;Ferrari, Gabriele
我们报道了利用D-1光学跃迁（3s S-2（1/2）-> 3 p P-2（1/2））在589.8nm实现灰糖蜜中钠原子的亚多普勒激光冷却。该技术应用于含有3 × 10（9）原子的样品，预先在磁光阱中冷却到350 μ K，它导致温度低至9 μ K，相空间密度在10（-4）的范围内。灰糖蜜的捕集效率大于2/3，并且我们观察到密度高达10（11）cm（-3）时没有密度依赖的加热。
We report on the realization of sub-Doppler laser cooling of sodium atoms in gray molasses using the D-1 optical transition (3s S-2(1/2) -> 3p P-2(1/2)) at 589.8 nm. The technique is applied to samples containing 3 x 10(9) atoms, previously cooled to 350 mu K in a magneto-optical trap, and it leads to temperatures as low as 9 mu K and phase-space densities in the range of 10(-4). The capture efficiency of the gray molasses is larger than 2/3, and we observe no density-dependent heating for densities up to 10(11) cm(-3).