铬亚稳原子在光阱中的积累
Accumulation of chromium metastable atoms into an Optical Trap
摘要：
我们报道了大量的亚稳态52 Cr原子在混合陷阱中的快速积累，该混合陷阱由强限制光阱和四极磁阱叠加而成。在约400 ms后达到稳态，在约100微K的温度下提供超过一百万个亚稳态原子的云，峰值密度为10^{18}原子.m^{-3}。我们优化了加载过程，并通过分析囚禁原子对参量激发的响应，测量了5D4态的光移。我们比较了这一结果的基础上，现有的光谱数据铬原子的理论评价。
英文摘要：
We report the fast accumulation of a large number of metastable 52Cr atoms in a mixed trap, formed by the superposition of a strongly confining optical trap and a quadrupolar magnetic trap. The steady state is reached after about 400 ms, providing a cloud of more than one million metastable atoms at a temperature of about 100 microK, with a peak density of 10^{18} atoms.m^{-3}. We have optimized the loading procedure, and measured the light shift of the 5D4 state by analyzing how the trapped atoms respond to a parametric excitation. We compare this result to a theoretical evaluation based on the available spectroscopic data for chromium atoms.
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