APS Logo

Progress on the Measurement of the Electric Dipole Moment of <sup>171</sup>Yb Atoms

POSTER

Abstract

The permanent electric dipole moments (EDMs) originatesoriginate from the sources of CP-violation. We present an experimental search for the EDM of the 171Yb (I=1/2) atom with atoms held in an optical dipole trap (ODT), and a coherent spin precession time of up to hundreds of seconds. By enabling a cycling transition that is simultaneously spin-selective and spin-preserving, a quantum non-demolition measurement allows spin detection near the shot-noise limit. A systematic effect due to parity mixing induced by a static E field is observed and is suppressed by averaging between measurements with ODTs in opposite directions. Our result places a limit of |dYb-171|< 1.5x10-26 e cm (95% C.L.). We describe and discuss several experimental upgrades, such as enhanced electric field strength, and suppressed magnetic field noise. Together, these upgrades are projected to increase the statistical sensitivity of the experiment by one order of magnitude.

Publication: [1] Zheng, T. A., Yang, Y. A., Wang, S.-Z., Singh, J. T., Xiong, Z.-X., Xia, T., & Lu, Z.-T. (2022). Measurement of the Electric Dipole Moment of 171 Yb Atoms in an Optical Dipole Trap. Physical Review Letters, 129(8), 083001.<br>[2] Yang, Y. A., Zheng, T. A., Wang, S. Z., Hu, W. K., Zou, C. L., Xia, T., & Lu, Z. T. (2022). Quantum Non-Demolition Measurement on the Spin Precession of Laser-Trapped 171 Yb Atoms. arXiv preprint arXiv:2209.08218.

Presenters

  • Yang A Yang

    University of Science and Technology of China

Authors

  • Yang A Yang

    University of Science and Technology of China

  • Shao-Zheng A Wang

    University of Science and Technology of China

  • Tao A Zheng

    University of Science and Technology of China

  • Tian Xia

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

  • Zheng-Tian Lu

    University of Science and Technology of China