利用囚禁分子离子精确测量电子的电偶极矩。
Precision Measurement of the Electron's Electric Dipole Moment Using Trapped Molecular Ions.
作者信息
Cairncross William B, Gresh Daniel N, Grau Matt, Cossel Kevin C, Roussy Tanya S, Ni Yiqi, Zhou Yan, Ye Jun, Cornell Eric A
机构信息
JILA, NIST and University of Colorado, Boulder, Colorado 80309-0440, USA and Department of Physics, University of Colorado, Boulder, Colorado 80309-0440, USA.
出版信息
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。
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