论文标题
带有三个电子状态的离子光学时钟
Ion optical clocks with three electronic states
论文作者
论文摘要
光学时钟是精确度量的幻想，但它们需要科学家频繁维护。支撑激光系统是这些仪器的特别苛刻的组成部分。为了降低复杂性并提高鲁棒性，我们提出了一个使用被困的碱性离子的光学时钟，该离子使用$ s_ {1/2} \ rightarrow d_ {3/2} $ electric quadrupole transition。与传统的第三章时钟相比，这减少了所需的激光波长的数量，并使用了由核自旋$ i = 1/2 $启用的超细状态准备和读数技术。我们将$^{225} $ ra $^{+} $作为具有三个电子状态的时钟的候选系统，并讨论有助于实现可运输光学时钟的潜力。
Optical clocks are the apotheosis of precision measurement, but they require frequent maintenance by scientists. The supporting laser systems are a particularly demanding component of these instruments. To reduce complexity and increase robustness we propose an optical clock with trapped alkali-like ions that use the $S_{1/2}\rightarrow D_{3/2}$ electric quadrupole transition. Compared to traditional group-II ion clocks this reduces the number of laser wavelengths required, and uses hyperfine state preparation and readout techniques enabled by the nuclear spin $I=1/2$. We consider $^{225}$Ra$^{+}$ as a candidate system for a clock with three electronic states, and discuss the potential to help realize a transportable optical clock.
