Presentation
9 March 2023 Fifth-force search with trapped Yb ions
Diana Aude Craik, Joonseok Hur, Ian Counts, Evgenii Kniazev, Luke Caldwell, Calvin Leung, Amy Geddes, Julian Berengut, Swadha Pandey, Akio Kawasaki, Paul-Gerhard Reinhard, Witold Nazarewicz, Honggi Jeon, Wonho Jhe, Vladan Vuletić
Author Affiliations +
Abstract
I present results of a search for new physics performed by measuring isotope shifts (IS) in Yb+ at the Vuletić group at MIT and discuss plans to perform IS spectroscopy of Ca+ with Jonathan Home's group at ETH. Isotope shifts, when measured on at least two atomic transitions can be displayed in a King plot. The presence of nonlinearities in such a plot indicates the existence of effects beyond the expected first-order standard model (SM) contributions to the IS's. We measured IS's on three narrow transitions in five isotopes of Yb+ and observe King nonlinearity with more than 40 sigma confidence. Further, we find 4-sigma evidence that there are at least two distinct physical effects contributing to the observed nonlinearity. We identify the largest effect as originating from isotope-dependent differences in the 4th-order nuclear charge moment. We discuss possible sources of the second nonlinearity and find that it likely cannot be explained by the expected next-largest SM contribution.
Conference Presentation
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Diana Aude Craik, Joonseok Hur, Ian Counts, Evgenii Kniazev, Luke Caldwell, Calvin Leung, Amy Geddes, Julian Berengut, Swadha Pandey, Akio Kawasaki, Paul-Gerhard Reinhard, Witold Nazarewicz, Honggi Jeon, Wonho Jhe, and Vladan Vuletić "Fifth-force search with trapped Yb ions", Proc. SPIE PC12447, Quantum Sensing, Imaging, and Precision Metrology, PC124471I (9 March 2023); https://doi.org/10.1117/12.2657359
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