论文标题
$^{171} $ yb原子的电偶极矩的测量
Measurement of the Electric Dipole Moment of $^{171}$Yb Atoms in an Optical Dipole Trap
论文作者
论文摘要
$^{171} $ yb $（i = 1/2）$原子的永久电动偶极矩（EDM）的原子在光学偶极陷阱（ODT）中的原子测量。通过实现同时自旋选择和自旋保护的循环过渡，实现了量子非隔离测量，自旋检测效率为50 $ \％$。观察到由于静态E场引起的奇偶校验混合而引起的系统效应，并通过在相反方向的ODT之间进行平均测量来抑制。发现连贯的自旋进动时间要长得多于300 s。 EDM被确定为$ d（{\ rm^{171} yb}）= {\ color {black}（ - 6.8 \ pm5.1 _ {\ rm Stat} \ pm1.2 _ {\ rm syst}）美元这些测量技术可以适应$^{225} $ ra的EDM。
The permanent electric dipole moment (EDM) of the $^{171}$Yb $(I=1/2)$ atom is measured with atoms held in an optical dipole trap (ODT). By enabling a cycling transition that is simultaneously spin-selective and spin-preserving, a quantum non-demolition measurement with a spin-detection efficiency of 50$\%$ is realized. A systematic effect due to parity mixing induced by a static E field is observed, and is suppressed by averaging between measurements with ODTs in opposite directions. The coherent spin precession time is found to be much longer than 300 s. The EDM is determined to be $d({\rm^{171}Yb})={\color{black}(-6.8\pm5.1_{\rm stat}\pm1.2_{\rm syst})\times10^{-27}\ e\ \rm cm}$, leading to an upper limit of $|d({\rm^{171}Yb})|<{\color{black}1.5\times10^{-26}\ e\ \rm cm}$ ($95\%$ C.L.). These measurement techniques can be adapted to search for the EDM of $^{225}$Ra.
