Skip to main content
U.S. flag

An official website of the United States government

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.

Testing the Stability of Fundamental Constants with the 199 Hg+ Single-Ion Optical Clock



S Bize, Scott Diddams, U Tanaka, C E. Tanner, W Oskay, Robert E. Drullinger, Tom Parker, Thomas P. Heavner, Steven R. Jefferts, Leo W. Hollberg, Wayne M. Itano, James C. Bergquist
Physical Review Letters


Bize, S. , Diddams, S. , Tanaka, U. , Tanner, C. , Oskay, W. , Drullinger, R. , Parker, T. , Heavner, T. , Jefferts, S. , Hollberg, L. , Itano, W. and Bergquist, J. (2003), Testing the Stability of Fundamental Constants with the <sup>199</sup> Hg<sup>+</sup> Single-Ion Optical Clock, Physical Review Letters, [online], (Accessed April 21, 2024)
Created December 31, 2002, Updated October 12, 2021