A strontium lattice clock with 3 x 10-17 inaccuracy and its frequency
A strontium lattice clock with 3 x 10-17 inaccuracy and its frequency
复制标题
DOI：
10.1088/1367-2630/16/7/073023
复制
发表时间：
2014-07-17
影响因子：
3.3
通讯作者：
Lisdat, Christian
中科院分区：
文献类型：
--
作者：
Falke, Stephan;Lemke, Nathan;Lisdat, Christian
我们在PTB用两个铯原子喷泉钟测量了Sr-87光晶格钟的绝对频率，其不确定度为3.9 × 10 ~（-16）。这接近于当今SI秒的最佳实现的精度。Sr-87的5s（2）S-1（0）-5s 5 p P-3（0）跃迁的绝对频率为429228004229873.13（17）Hz。我们的结果与最近在世界各地不同实验室进行的测量结果非常一致。我们将Sr频率标准的总系统不确定度提高了5倍，达到3 × 10（-17），为基础研究、大地测量或光学钟评估的光学钟之间的频率比测量开辟了新的前景。
We have measured the absolute frequency of the optical lattice clock based on Sr-87 at PTB with an uncertainty of 3.9 x 10(-16) using two caesium fountain clocks. This is close to the accuracy of today's best realizations of the SI second. The absolute frequency of the 5 s(2) S-1(0) - 5s5p P-3(0) transition in Sr-87 is 429 228 004 229 873.13(17) Hz. Our result is in excellent agreement with recent measurements performed in different laboratories worldwide. We improved the total systematic uncertainty of our Sr frequency standard by a factor of five and reach 3 x 10(-17), opening new prospects for frequency ratio measurements between optical clocks for fundamental research, geodesy or optical clock evaluation.