Chou, C.
, Hume, D.
, Koelemeij, J.
, Wineland, D.
and Rosenband, T.
(2010),
Frequency Comparison of Two High-Accuracy Al+ Optical Clocks, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904590
(Accessed November 21, 2024)
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Frequency Comparison of Two High-Accuracy Al+ Optical Clocks
Published
Author(s)
, , J.C. Koelemeij, ,
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.Citation
Physical Review Letters
Volume
104
Pub Type
Journals
Download Paper
Keywords
atomic clock, optical clock, high accuracy, aluminum ion, quantum logic
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.
Created February 17, 2010, Updated February 19, 2017