中国物理B ›› 2023, Vol. 32 ›› Issue (4): 40602-040602.doi: 10.1088/1674-1056/ac8344
Jun-Ru Shi(施俊如)1,2,3, Xin-Liang Wang(王心亮)1,2,†, Fan Yang(杨帆)1,2,3, Yang Bai(白杨)1,2,3, Yong Guan(管勇)1,2, Si-Chen Fan(范思晨)1,2,3, Dan-Dan Liu(刘丹丹)1,2, Jun Ruan(阮军)1,2, and Shou-Gang Zhang(张首刚)1,2
Jun-Ru Shi(施俊如)1,2,3, Xin-Liang Wang(王心亮)1,2,†, Fan Yang(杨帆)1,2,3, Yang Bai(白杨)1,2,3, Yong Guan(管勇)1,2, Si-Chen Fan(范思晨)1,2,3, Dan-Dan Liu(刘丹丹)1,2, Jun Ruan(阮军)1,2, and Shou-Gang Zhang(张首刚)1,2
摘要: The caesium atomic fountain clock is a primary frequency standard. During its operation, a Majorana transition frequency shift will occur once a magnetic field at some special locations along the atomic trajectory is singular. In this study, by developing a physical model, we analyzed the magnetic field requirements for atomic adiabatic transition and calculated the influence of the Majorana atomic transition on the atomic state via a quantum method. Based on the simulation results for the magnetic field in the fountain clock, we applied the Monte Carlo method to simulate the relationship between the Majorana transition frequency shift and the magnetic field at the entrance of the magnetic shielding, as well as the initial atomic population. Measurement of the Majorana transition frequency shift was realized by state-selecting asymmetrically populated atoms. The relationship between the Majorana transition frequency shift and the axial magnetic field at the entrance of the magnetic shielding was obtained. The measured results were essentially consistent with the calculated results. Thus, the magnetic field at the entrance of the magnetic shielding was configured, and the Majorana transition frequency shift of the fountain clock was calculated to be 4.57×10-18.
中图分类号: (Time and frequency)