Improved frequency ratio measurement with 87Sr and 171Yb optical lattice clocks at NMIJ
Improved frequency ratio measurement with 87Sr and 171Yb optical lattice clocks at NMIJ
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NMIJ 使用 87Sr 和 171Yb 光学晶格时钟改进频率比测量
DOI：
10.1088/1681-7575/abc104
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发表时间：
2021
期刊：
影响因子：
2.4
通讯作者：
and Masami Yasuda
中科院分区：
文献类型：
--
作者：
Yusuke Hisai;Daisuke Akamatsu;Takumi Kobayashi;Kazumoto Hosaka;Hajime Inaba;Feng-Lei Hong;and Masami Yasuda
我们报告了改进的频率比测量与87 Sr和171 Yb光晶格钟在日本国家计量研究所。87 Sr光学晶格钟经过几次重大修改后得到增强，并重新评估，不确定度降低到1.1× 10− 16。我们使用了一个不确定度为4× 10− 16的171 Yb光学晶格时钟，该时钟是为国际原子时而开发的。测量结果为ν Yb/ν Sr= 1.207 507 039 343 338 58（49）sys（6）stat，分数不确定度为4.1× 10− 16，比我们以前的测量结果小3.4倍。
We report improved frequency ratio measurement with 87 Sr and 171 Yb optical lattice clocks at the National Metrology Institute of Japan. The 87 Sr optical lattice clock is enhanced with several major modifications and is re-evaluated with a reduced uncertainty of 1.1× 10− 16. We employed a 171 Yb optical lattice clock with an uncertainty of 4× 10− 16 that was developed for contributing to International Atomic Time. The measurement result is ν Yb/ν Sr= 1.207 507 039 343 338 58 (49) sys (6) stat with a fractional uncertainty of 4.1× 10− 16, which is 3.4 times smaller than our previous measurement result.