Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Frequency Comparison of Al+ and Hg+ Optical Standards

Published

Author(s)

Till P. Rosenband, David Hume, Anders Brusch, Luca Lorini, P. O. Schmidt, Tara M. Fortier, Jason Stalnaker, Scott A. Diddams, Nathan R. Newbury, W Swann, Windell Oskay, Wayne M. Itano, David J. Wineland, James C. Bergquist

Abstract

We compare the frequencies of two single ion frequency standards: 27Al+ and 199Hg+. Systematic fractional frequency uncertainties of both standards are below 10-16, and the statistical measurement uncertainty is below 5 x 10-17. Recent ratio measurements show a reproducibility that is better than 10-16.
Proceedings Title
Proc. 2007 ICOLS Meeting
Conference Dates
June 24-29, 2007
Conference Location
Telluride, CO

Keywords

atom trapping and cooling, quantum computation, quantum information processing, quantum superpositions, quantum-state engineering, trapped ions
Created June 24, 2007, Updated January 27, 2020