2023/07/04 by Yong Zheng, H. R. Qin, Zheng, Y +13
Engineering · Physics and Astronomy · #Advanced Electrical Measurement Techniques #Advanced Frequency and Time Standards #Atomic Physics (physics.atom-ph) #Atomic and Subatomic Physics Research #FOS: Physical sciences #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.2307.01656
openalex publication_date 2023/07/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We reported the realization of a 174Yb+-113Cd+ bi-species Coulomb crystal comprising 174Yb+ ions as coolant and verified its potential for application as a 113Cd+ microwave frequency standard employing sympathetic cooling.The two species of massive ions stably trapped in a Paul trap make up this large two-component crystal. The 113Cd+ ions are trapped in the center, which reduces considerably RF heating and excess micromotion to which the 113Cd+ ions are subjected. Under this scheme, the uncertainty due to the second-order Doppler effect is reduced to 5×10-16, which represents an order of magnitude improvement over sympathetic cooled 40Ca+-113Cd+ crystal. The uncertainty from the second-order Zeeman effect, which contributes the largest uncertainty to the microwave-ion frequency standard, is reduced to 4×10-16. The relevant AC Stark shift uncertainty is estimated to be 4×10-19. These results indicate using 174Yb+ as coolant ions for 113Cd+ is far superior and confirm the feasibility of a sympathetic-cooled cadmium-ion microwave clock system employing a 174Yb+-113Cd+ two-component crystal.