APS Logo

Measurement of the Electric Dipole Moment of <sup>171</sup>Yb Atoms in an Optical Dipole Trap

ORAL

Abstract

The permanent electric dipole moment (EDM) [1] of the 171Yb [2] (I = 1/2) atom is measured with atoms held in an optical dipole trap (ODT). A quantum non-demolition measurement with a spin-detection efficiency of 50% is realized. A systematic effect due to parity mixing induced by a static E field [3] is observed, and is suppressed by averaging between measurements with ODTs in opposite directions. The coherent spin precession time is found to be longer than 100 s. The result shows a sensitivity of E-26 e cm in searching for 171Yb EDM. We describe the progress, challenges, and prospects of the experiment. Through this experiment, we develop atom manipulation techniques and study systematics for a parallel search for the EDM of 225Ra[4,5], a radioactive isotope expected to possess a much larger Schiff moment due to its nuclear octupole deformation.

–

Publication: [1] Chupp, T. E., et al. (2019) 'Electric dipole moments of atoms, molecules, nuclei, and particles', Reviews of Modern Physics, 91(1), pp. 015001.<br>[2] Dzuba, V. A., Flambaum, V. V. and Ginges, J. S. M. (2007) 'Atomic electric dipole moments of He and Yb induced by nuclear Schiff moments', Physical Review A, 76(3).<br>[3] Romalis, M. V. and Fortson, E. N. (1999) 'Zeeman frequency shifts in an optical dipole trap used to search for an electric-dipole moment', Physical Review A, 59(6), pp. 4547-4558.<br>[4] Parker, R. H., et al. (2015) 'First Measurement of the Atomic Electric Dipole Moment of 225Ra', Physical Review Letters, 114(23), pp. 233002.<br>[5] Bishof, M., et al. (2016) 'Improved limit on the 225Ra electric dipole moment', Physical Review C, 94(2), pp. 025501.

Presenters

  • Tao Zheng

    University of Science and Technology of China

Authors

  • Tao Zheng

    University of Science and Technology of China

  • Yang A Yang

    University of Science and Technology of China

  • Shao-Zheng Wang

    University of Science and Technology of China

  • Jaideep T Singh

    Michigan State University

  • Zhuan-Xian Xiong

    Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan

  • Tian Xia

    University of Science and Technology of, University of Science and Technology of China

  • Zheng-Tian Lu

    University of Science and Technology of China, University of Science and Technology of China, Hefei, China