论文标题
$ {}^{172} $ yb $^+$的高度禁止电动八极过渡的连贯激发
Coherent excitation of the highly forbidden electric octupole transition in ${}^{172}$Yb$^+$
论文作者
论文摘要
我们报告了高度禁止的$^2S_ {1/2} \ rightArrow {}^2f_ {7/2} $ electry octupole（e3）在单个被困的$ {}^{172}^{172} $ yb $ yb $^+$ $ $ ion，无核旋转中，使用$ {}^{171} $ yb $^+$中的过渡作为参考，我们确定过渡频率为$ 642 \，116 \，784 \，950 \，887.6（2.4）\，$ hz。我们使用禁止的$^2S_ {1/2} \ rightarrow {}^2D_ {5/2} $ electric quadrupole（e2）过渡并确定其频率为$ 729 \，476 \，867 \，867 \，027 \，027 \，206.8（4.4（4.4（4.4（4.4））。与以前的测量相比，我们的结果是$ 1 \ times10^5 $（$ 3 \ times10^{5} $）更准确。结果通过精确的同位素偏移测量值和改进本地Lorentz不变性的测试开辟了道路，并使用了Yb $^+$的状态进行了局部Lorentz不变性测试。
We report on the first coherent excitation of the highly forbidden $^2S_{1/2}\rightarrow{}^2F_{7/2}$ electric octupole (E3) transition in a single trapped ${}^{172}$Yb$^+$ ion, an isotope without nuclear spin. Using the transition in ${}^{171}$Yb$^+$ as a reference, we determine the transition frequency to be $642\,116\,784\,950\,887.6(2.4)\,$Hz. We map out the magnetic field environment using the forbidden $^2S_{1/2} \rightarrow{}^2D_{5/2}$ electric quadrupole (E2) transition and determine its frequency to be $729\,476\,867\,027\,206.8(4.4)\,$Hz. Our results are a factor of $1\times10^5$ ($3\times10^{5}$) more accurate for the E2 (E3) transition compared to previous measurements. The results open up the way to search for new physics via precise isotope shift measurements and improved tests of local Lorentz invariance using the metastable $^2F_{7/2}$ state of Yb$^+$.
