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Suppressing Inhomogeneous Broadening in a Lutetium Multi-ion Optical Clock

TitleSuppressing Inhomogeneous Broadening in a Lutetium Multi-ion Optical Clock
Publication TypeJournal Article
Year of Publication2019
AuthorsT.. R. Tan, R.. Kaewuam, K.. J. Arnold, S.. R. Chanu, Z. Zhang, M.. S. Safronova, and M.. D. Barrett
JournalPhys. Rev. Lett.
Date PublishedAUG 7
Type of ArticleArticle

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.