Abstract
We report on Raman sideband cooling of to sympathetically cool the secular modes of motion in a two-ion pair to near the three-dimensional (3D) ground state. The evolution of the Fock-state distribution during the cooling process is studied using a rate-equation simulation, and various heating sources that limit the efficiency of 3D sideband cooling in our system are discussed. We characterize the residual energy and heating rates of all of the secular modes of motion and estimate a secular motion time-dilation shift of for an clock at a typical clock probe duration of 150 ms. This is a 50-fold reduction in the secular motion time-dilation shift uncertainty in comparison with previous clocks.
- Received 15 August 2016
DOI:https://doi.org/10.1103/PhysRevLett.118.053002
Published by the American Physical Society
Physics Subject Headings (PhySH)
Viewpoint
Trapped Ions Stopped Cold
Published 30 January 2017
A novel method for cooling trapped ions could boost the accuracy of atomic clocks.
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