论文标题
$^{40} $ ca $^{+} $ ion时钟的全光捕获的红外魔术波长的测量
Measurement of infrared magic wavelength for an all-optical trapping of $^{40}$Ca$^{+}$ ion clock
论文作者
论文摘要
我们第一次在实验上确定$^{40} $ ca $^{+$ 4S \，^{2} \！ $^{40} $ CA $^{+} $光学时钟。选择一个“魔术”磁场方向使魔术波长对线性极化纯度和激光的极化方向不敏感。该过渡的确定的魔术波长为1056.37（9）〜nm，这不仅与理论预测吻合良好，而且更精确地比例约为300倍。使用这种测得的魔术波长，我们还得出了差异性静态性极化性，即$ -44.32（32）（32）$ 〜A.U.U.U。我们的工作铺平了一种方法，用于$^{40} $ ca $^{+} $光学时钟的全光捕获。
For the first time, we experimentally determine the infrared magic wavelength for the $^{40}$Ca$^{+}$ $4s\, ^{2}\!S_{1/2} \rightarrow 3d\,^{2}\!D_{5/2}$ electric quadrupole transition by observation of the light shift canceling in $^{40}$Ca$^{+}$ optical clock. A "magic" magnetic field direction is chosen to make the magic wavelength insensitive to both the linear polarization purity and the polarization direction of the laser. The determined magic wavelength for this transition is 1056.37(9)~nm, which is not only in good agreement with theoretical predictions but also more precise by a factor of about 300. Using this measured magic wavelength we also derive the differential static polarizability to be $-44.32(32)$~a.u., which will be an important input for the evaluation of the blackbody radiation shift at room temperatures. Our work paves a way for all-optical-trapping of $^{40}$Ca$^{+}$ optical clock.
