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arXiv 2002.02332physics.atom-ph
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测量电子电偶极矩的新技术

New techniques for a measurement of the electron's electric dipole moment

C. J. Ho, J. A. Devlin, I. M. Rabey, P. Yzombard, J. Lim, S. C. Wright, N. J. Fitch, E. A. Hinds, M. R. Tarbutt, B. E. Sauer

摘要:

电子的电偶极矩(eEDM)可以使用重极性分子以高精度测量。在本文中,我们报告了一系列的新技术,提高了统计灵敏度的YbF eEDM实验。我们增加了一个数量级的分子参与实验,使用精心设计的光泵浦方案。我们还增加了这些分子的检测效率的另一个数量级,使用光学循环方案。此外,我们还展示了如何使暗态不稳定并减少背景,否则会限制这些技术的效率。总之,这些改进使我们能够证明一天的测量后,$1.8 \times 10^{-28}$ e cm的统计灵敏度,这是散粒噪声限制的1.2倍。这里介绍的技术适用于其他高精度测量使用分子。

英文摘要:

The electric dipole moment of the electron (eEDM) can be measured with high precision using heavy polar molecules. In this paper, we report on a series of new techniques that have improved the statistical sensitivity of the YbF eEDM experiment. We increase the number of molecules participating in the experiment by an order of magnitude using a carefully designed optical pumping scheme. We also increase the detection efficiency of these molecules by another order of magnitude using an optical cycling scheme. In addition, we show how to destabilise dark states and reduce backgrounds that otherwise limit the efficiency of these techniques. Together, these improvements allow us to demonstrate a statistical sensitivity of $1.8 \times 10^{-28}$ e cm after one day of measurement, which is 1.2 times the shot-noise limit. The techniques presented here are applicable to other high-precision measurements using molecules.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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