Cairncross William B, Gresh Daniel N, Grau Matt, Cossel Kevin C, Roussy Tanya S, Ni Yiqi, Zhou Yan, Ye Jun, Cornell Eric A
JILA, NIST and University of Colorado, Boulder, Colorado 80309-0440, USA and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA.
Phys Rev Lett. 2017 Oct 13;119(15):153001. doi: 10.1103/PhysRevLett.119.153001. Epub 2017 Oct 9.
We describe the first precision measurement of the electron's electric dipole moment (d_{e}) using trapped molecular ions, demonstrating the application of spin interrogation times over 700 ms to achieve high sensitivity and stringent rejection of systematic errors. Through electron spin resonance spectroscopy on ^{180}Hf^{19}F^{+} in its metastable ^{3}Δ_{1} electronic state, we obtain d_{e}=(0.9±7.7_{stat}±1.7_{syst})×10^{-29} e cm, resulting in an upper bound of |d_{e}|<1.3×10^{-28} e cm (90% confidence). Our result provides independent confirmation of the current upper bound of |d_{e}|<9.4×10^{-29} e cm [J. Baron et al., New J. Phys. 19, 073029 (2017)NJOPFM1367-263010.1088/1367-2630/aa708e], and offers the potential to improve on this limit in the near future.
我们描述了首次使用捕获的分子离子对电子电偶极矩（(d_{e})）进行的精确测量，展示了超过700毫秒的自旋询问时间的应用，以实现高灵敏度并严格排除系统误差。通过对处于亚稳(^{3}\Delta_{1})电子态的(^{180}Hf^{19}F^{+})进行电子自旋共振光谱分析，我们得到(d_{e}=(0.9±7.7_{统计}±1.7_{系统})×10^{-29}) (e) (cm)，得出(|d_{e}|\lt1.3×10^{-28}) (e) (cm)的上限（90%置信度）。我们的结果为当前(|d_{e}|\lt9.4×10^{-29}) (e) (cm)的上限提供了独立验证[J. Baron等人，《新物理学杂志》19，073029（2017）NJOPFM1367 - 263010.1088/1367 - 2630/aa708e]，并在不久的将来提供了改进这一极限的潜力。
