|Title||Suppressing Inhomogeneous Broadening in a Lutetium Multi-ion Optical Clock|
|Publication Type||Journal Article|
|Year of Publication||2019|
|Authors||T.. R. Tan, R.. Kaewuam, K.. J. Arnold, S.. R. Chanu, Z. Zhang, M.. S. Safronova, and M.. D. Barrett|
|Journal||Phys. Rev. Lett.|
|Date Published||AUG 7|
|Type of Article||Article|
We demonstrate precision measurement and control of inhomogeneous broadening in a multi-ion clock consisting of three Lu-176(+) ions. Microwave spectroscopy between hyperfine states in the D-3(1) level is used to characterize differential systematic shifts between ions, most notably those associated with the electric quadrupole moment. By appropriate alignment of the magnetic field, we demonstrate suppression of these effects to the similar to 10(-17) level relative to the S-1(0) <-> D-3(1) optical transition frequency. Correlation spectroscopy on the optical transition demonstrates the feasibility of a 10-s Ramsey interrogation in the three ion configuration with a corresponding projection noise limited stability of sigma(tau) = 8.2 x 10(-17)/root tau.