Observation of the electric Breit-Rabi effect
成果类型：
Article
署名作者：
Wang, Shao-Zheng; Wang, Shou-Bo; Tao, Zhi-Jin; Xia, Tian; Lu, Zheng-Tian
署名单位：
Chinese Academy of Sciences; University of Science & Technology of China, CAS; Hefei National Laboratory; Chinese Academy of Sciences; University of Science & Technology of China, CAS
刊物名称：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
ISSN/ISSBN：
0027-10783
DOI：
10.1073/pnas.2423902122
发表日期：
2025-07-01
关键词：
摘要：
The response of an atom to external electric and magnetic fields can reveal fundamental atomic properties. It has long been verified that, in a static magnetic field, those atomic energy levels with hyperfine interactions shift according to the Breit-Rabi formula, which introduces nonlinear dependence on the magnetic field. On the other hand, the corresponding Breit-Rabi dependence on a static electric field has not been observed before due to a combination of experimental challenges. Here, we precisely measure the Stark shift of the 6s2 1S0 <-> 6s6p 1P1 transition of 171Yb (I = 1/2) with cold atoms held by an optical dipole trap in a static electric field up to 120 kV/cm. We observe the electric Breit-Rabi effect displaying high-order (E4 and E6) DC Stark shifts. These effects arise from the influence of the strong electric field on hyperfine interactions.