论文标题
$^{176} $ lu $^+$ $时钟比较$ 10^{ - 18} $级别通过相关光谱
$^{176}$Lu$^+$ clock comparison at the $10^{-18}$ level via correlation spectroscopy
论文作者
论文摘要
我们在实验中证明了使用相关光谱范围的两个$^{176} $ lu $^+$频率参考之间的一致性。从不同磁场的比较中，我们获得了二次Zeeman系数$ -4.89264（88）\，\ Mathrm {Hz/Mt^2} $，该$ 2.5 \ times 10^{ - 20} $的相应分数频率不确定性贡献在典型的手术和0.1的比较$ 2.5 \ times 10^{-20} $ 0.1 c。随后与两个系统在0.1 \ mt处进行比较，演示了$（-2.0 \ pm（3.7）_ \ Mathrm {stat} \ pm（0.9）_ \ mathrm {sys}）\ pm（3.7）_ \ mathrm {sys}）\ times10^{-18} $，s stat stat'和sys的统计信息，并在systanticalsitive and Indicative and Indication and Incestion and Incestion and Incection and Incection and Incection and Incection，
We experimentally demonstrate agreement between two $^{176}$Lu$^+$ frequency references using correlation spectroscopy. From a comparison at different magnetic fields, we obtain a quadratic Zeeman coefficient of $-4.89264(88)\,\mathrm{Hz/mT^2}$, which gives a corresponding fractional frequency uncertainty contribution of just $2.5\times 10^{-20}$ for comparisons at typical operating fields of 0.1\,mT. A subsequent comparison with both systems at 0.1\,mT, demonstrates a fractional frequency difference of $(-2.0\pm(3.7)_\mathrm{stat}\pm(0.9)_\mathrm{sys})\times10^{-18}$, where `stat' and `sys' indicate statistical and systematic uncertainty, respectively.
