Frequency Comparison of Two High-Accuracy Al+ Optical Clocks
Quantum Physics
2013-05-29 v2
Abstract
We have constructed an optical clock with a fractional frequency inaccuracy of 8.6e-18, based on quantum logic spectroscopy of an Al+ ion. A simultaneously trapped Mg+ ion serves to sympathetically laser-cool the Al+ ion and detect its quantum state. The frequency of the 1S0->3P0 clock transition is compared to that of a previously constructed Al+ optical clock with a statistical measurement uncertainty of 7.0e-18. The two clocks exhibit a relative stability of 2.8e-15/ sqrt(tau), and a fractional frequency difference of -1.8e-17, consistent with the accuracy limit of the older clock.
Cite
@article{arxiv.0911.4527,
title = {Frequency Comparison of Two High-Accuracy Al+ Optical Clocks},
author = {C. -W. Chou and D. B. Hume and J. C. J. Koelemeij and D. J. Wineland and T. Rosenband},
journal= {arXiv preprint arXiv:0911.4527},
year = {2013}
}
Comments
4 pages, 2 tables, 3 figures