论文标题
对$α$变化的最高敏感性的新时钟过渡，并同时使用YB中的其他时钟过渡
A New Clock Transition with the Highest Sensitivity to $α$ Variation and Simultaneous Magic Trapping Conditions with Other Clock Transitions in Yb
论文作者
论文摘要
光学晶格时钟是可以探测许多微妙物理的前瞻性设备，包括精细结构常数的时间变化（$α_e$）。这些研究需要对原子钟频率比与前所未有的准确性进行高精度测量。与较早声称的最高敏感系数（$ k $）的时钟过渡到yb的$α_e$ [物理学。莱特牧师。 $\textbf{120}$, 173001 (2018)], we found the $4f^{14}6s6p\,(^3P_2) - 4f^{13}5d6s^{2}\,(^3P_2^*)$ transition of this atom can serve as the clock transition with the largest $K$ value (about $-$25(2)).此外，我们展示了一个方案，以与其他两个提议的时钟过渡达到同时达到魔术捕获条件$ 4F^{14} 6S^2 \，（^1s_0）-4f^{14} 6S6P \，（^3p_2） 4f^{13} 5d6s^{2} \，（^3p_2^*）$;还显示大$ k $值。可以通过在实验设置中沿量化轴以特定的极化角度将YB原子在特定的极化角处遇到偏置磁场来实现这种魔术条件。实现后，它将成为探测$α_e$变化的最潜在的光学晶格时钟。
Optical lattice clocks are the prospective devices that can probe many subtle physics including temporal variation of the fine structure constant ($α_e$). These studies necessitate high-precision measurements of atomic clock frequency ratios to unprecedented accuracy. In contrast to the earlier claimed highest sensitive coefficient ($K$) clock transition to $α_e$ in Yb [Phys. Rev. Lett. $\textbf{120}$, 173001 (2018)], we found the $4f^{14}6s6p\,(^3P_2) - 4f^{13}5d6s^{2}\,(^3P_2^*)$ transition of this atom can serve as the clock transition with the largest $K$ value (about $-$25(2)). Moreover, we demonstrate a scheme to attain simultaneous magic trapping conditions for this clock transition with the other two proposed clock transitions $4f^{14}6s^2\,(^1S_0) - 4f^{14}6s6p\,(^3P_2)$ and $4f^{14}6s^2\,(^1S_0) - 4f^{13}5d6s^{2}\,(^3P_2^*)$; also exhibiting large $K$ values. This magic condition can be realized by subjecting Yb atoms to a bias magnetic field at a particular polarization angle along the quantization axis in an experimental set up. Upon realization, it will serve as the most potential optical lattice clock to probe $α_e$ variation.
