Radium Ion Optical Clock
Radium Ion Optical Clock
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镭离子光钟
DOI：
10.1103/physrevlett.128.033202
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发表时间：
2022
影响因子：
8.6
通讯作者：
Jayich, A. M.
中科院分区：
文献类型：
--
作者：
Holliman, C. A.;Fan, M.;Contractor, A.;Brewer, S. M.;Jayich, A. M.
我们报道了一个有希望的高性能时钟候选者--光钟的首次运行。该时钟采用单阱，工作于电四极跃迁。通过自参考三对对称塞曼跃迁，我们证明了频率不稳定性，其中是平均时间，以秒为单位。总系统不确定度评估为。利用该时钟，我们实现了第一次测量状态与状态Landé因子之比：光钟可以改善光频比较中精细结构常数随时间变化的限制。离子还具有使其成为可移动光学时钟的合适系统的几个特征。
We report the first operation of aoptical clock, a promising high-performance clock candidate. The clock uses a single trappedion and operates on theelectric quadrupole transition. By self-referencing three pairs of symmetric Zeeman transitions, we demonstrate a frequency instability of, whereis the averaging time in seconds. The total systematic uncertainty is evaluated to be. Using the clock, we realize the first measurement of the ratio of thestate to thestate Landé-factors:. Aoptical clock could improve limits on the time variation of the fine structure constant,, in an optical frequency comparison. The ion also has several features that make it a suitable system for a transportable optical clock.