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Poster Session

Poster Session I (4pm-6pm CDT)

4:00 pm – 6:00 pm, Tuesday June 4 Session D00
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Measuring EDM of 171Yb Atoms in an Optical Dipole Trap

Poster 128
Presenter: Zheng S Wang (University of science and technology of china)
Authors: Yang Yang (University of Science and Technology of China), Tao Zheng (University of Science and Technology of China), Bo Wang (university of science and technology of china), Tian Xia (University of Science and Technology of China), Zheng-Tian Lu (University of Science and Technology of China)

The EDM of 171Yb (I = 1/2) is measured with atoms held in an optical dipole trap (ODT). Since Zheng et al. (2022) [1], the E field has been increased to 17.2 kV over an electrode gap of 1 mm, and noise due to the fluctuation of ODT polarization has been reduced. The EDM sensitivity is improved to E-27 e-cm. To quantify the systematic effect induced by parity mixing, both the E field and the ODT laser intensity are calibrated through Stark shifts. Under development is a scheme to simultaneously measure EDM in two ODTs traveling in opposite directions, which would improve statistics as well as suppress the parity-mixing systematic. These trapping and measurement techniques can be transferred to a next-generation EDM measurement of 225Ra.

Funding acknowledgement

This work has been supported by the National Natural Science Foundation of China through Grants No. 91636215, 12174371, 11704368.

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