Poster Session

Poster Session I (4pm-6pm CDT)

4:00 pm – 6:00 pm, Tuesday June 4 // Session D00

Topics:

Long coherence time of the JILA Generation III eEDM experiment

Poster 127

Presenter: Anzhou Wang (University of Colorado, Boulder)

Authors: Sun Yool Park (University of Colorado, Boulder), Addison Hartman (University of Colorado, Boulder), Patricia Hector Hernandez (University of Colorado, Boulder), Kia Boon Ng (University of Colorado, Boulder), Noah Schlossberger (University of Colorado, Boulder), Trevor Wright (JILA), Rohan Kompella (University of Colorado, Boulder), Jun Ye (CU Boulder), Eric Cornell (University of Colorado and NIST)

The recently concluded JILA experiment using HfF⁺ reported the most precise measurement yet of the electric dipole moment of the electron (eEDM), d_e = (-1.3 ± 2.0_stat ± 0.6_syst) × 10^-30 e cm, using electrons confined inside molecular ions [1,2]. The third-generation apparatus at JILA aims to push the limit even more, by taking advantage of the long coherence time of the eEDM-sensitive state (³Δ₁) of ThF⁺, which is the ground state [3,4,5]. We measure a coherence time of about 8 seconds in our prototype experiment, and report the limiting factors for the coherence time, including blackbody radiation, rotating electric field inhomogeneity, ion-neutral collisions, and ion-ion collisions.

[1] Roussy, Tanya S. et al. Science 381, 46-50(2023).

[2] Caldwell, Luke, et al. Phys. Rev. A 108.1 (2023): 012804.

[3] Gresh, Daniel N. et al. Journal of Molecular Spectroscopy 319 (2016): 1-9.

[4] Zhou, Yan et al. J. Mol. Spec. 358, (2019) 1-16.

[5] Ng, Kia Boon et al. Phys. Rev. A 105, 022823.

Funding acknowledgement

We would like to acknowledge funding from: AFOSR, the Sloan adn Moore Foundation, the Marsico Foundation, NIST, and NSF.

POSTERS (157)