论文标题
单个分子离子的旋转光谱在次级零件分子的分辨率下。
Rotational spectroscopy of a single molecular ion at sub part-per-trillion resolution
论文作者
论文摘要
我们使用具有高度相干频率梳子的单个CAH+离子的量子逻辑光谱（QLS）和询问旋转过渡，从而实现了4 x 10^-13的转换线中心的分数统计不确定性。由于RF Paul Trap中的分子离子经历的射频电场（RF）电场，我们还改善了测量Stark效应的分辨率，我们是我们表征和模型的。这使我们能够通过系统地将离子置换以采样不同的已知RF电场并测量过渡频率的变化来确定CAH+的电动偶极力矩。
We use quantum-logic spectroscopy (QLS) and interrogate rotational transitions of a single CaH+ ion with a highly coherent frequency comb, achieving a fractional statistical uncertainty for a transition line center of 4 x 10^-13. We also improve the resolution in measurement of the Stark effect due to the radio-frequency (rf) electric field experienced by a molecular ion in an rf Paul trap, which we characterize and model. This allows us to determine the electric dipole moment of CaH+ by systematically displacing the ion to sample different known rf electric fields and measuring the resultant shifts in transition frequency.
