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.
*This work has been supported by the Strategic Priority Research Program of the Chinese Academy of Sciences through Grant No. XDB21010200 and by the National Natural Science Foundation of China (NSFC) through grants No. 91636215, No. 11704368, and Anhui Initiative in Quantum Information Technologies through Grant No. AHY110000.
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. [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.
