塞曼效应
边带
物理
黑体辐射
多普勒效应
噪音(视频)
离子
测量不确定度
电场
光学
透射系数
计算物理学
激光冷却
艾伦方差
标准差
二极管
原子物理学
温度测量
低温学
材料科学
领域(数学)
二次方程
传输(电信)
液氮
原子钟
光电子学
作者
Anonymous,Zi-xiao Ma,Yao Huang,Hui-Li Han,Ru-ming Hu,Yuzhuo Wang,Hua-qing Zhang,Li Yan Tang,Ting Yun Shi,Guan Hua,Kelin Gao
摘要
We report a single-ion optical clock based on the 4S_{1/2}→3D_{5/2} transition of the ^{40}Ca^{+} ion, operated in a liquid nitrogen cryogenic environment, achieving a total systematic uncertainty of 4.4×10^{-19}. We employ a refined temperature evaluation scheme to reduce the frequency uncertainty due to blackbody radiation, and 3D sideband cooling to minimize the second-order Doppler shift. We have precisely determined the average Zeeman coefficient of the ^{40}Ca^{+} clock transition to be 14.345(15) Hz/mT^{2}, thereby significantly reducing the quadratic Zeeman shift uncertainty. Moreover, the cryogenic environment enables the lowest reported heating rate due to ambient electric field noise in trapped-ion optical clocks.
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