Abstract
We describe an optical atomic clock based on quantum-logic spectroscopy of the transition in with a systematic uncertainty of and a frequency stability of . A ion is simultaneously trapped with the ion and used for sympathetic cooling and state readout. Improvements in a new trap have led to reduced secular motion heating, compared to previous clocks, enabling clock operation with ion secular motion near the three-dimensional ground state. Operating the clock with a lower trap drive frequency has reduced excess micromotion compared to previous clocks. Both of these improvements have led to a reduced time-dilation shift uncertainty. Other systematic uncertainties including those due to blackbody radiation and the second-order Zeeman effect have also been reduced.
- Received 21 March 2019
- Revised 17 May 2019
DOI:https://doi.org/10.1103/PhysRevLett.123.033201
© 2019 American Physical Society
Physics Subject Headings (PhySH)
Erratum
Erratum: Quantum-Logic Clock with a Systematic Uncertainty below [Phys. Rev. Lett. 123, 033201 (2019)]
S. M. Brewer, J.-S. Chen, A. M. Hankin, E. R. Clements, C. W. Chou, D. J. Wineland, D. B. Hume, and D. R. Leibrandt
Phys. Rev. Lett. 131, 059901 (2023)
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