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Precision Measurement of the Electron's Electric Dipole Moment Using Trapped Molecular Ions


Bruno de Abreu Silva 

Wednesday, October 24, 2018

We describe the first precision measurement of the electron’s electric dipole moment (de) 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 180Hf19Fþ in its metastable 3 Δ1 electronic state, we obtain de ¼ ð0.9 7.7stat 1.7systÞ × 10−29 e cm, resulting in an upper bound of jdej < 1.3 × 10−28 e cm (90% confidence). Our result provides independent confirmation of the current upper bound of jdej < 9.4 × 10−29 e cm [J. Baron et al., New J. Phys. 19, 073029 (2017)], and offers the potential to improve on this limit in the near future.

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