Chen, J.
, Brewer, S.
, Hume, D.
, Chou, C.
, Wineland, D.
and Leibrandt, D.
(2017),
Sympathetic Ground State Cooling and Time-dilation Shifts in an 27Al+ Optical Clock, Physics Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=921576
(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.
Sympathetic Ground State Cooling and Time-dilation Shifts in an 27Al+ Optical Clock
Published
Author(s)
, , , , ,
Abstract
We report Raman sideband cooling of 25Mg+ to sympathetically cool the secular modes of motion in a 25Mg+-27Al+ two-ion pair to near the three-dimensional (3D) ground state. The evolution of the Fock state distributions 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 the secular modes of motion and estimate a secular motion time-dilation shift of -(1.92 +/- 0.11)* 10^{-18} for an 27Al+ clock at a typical clock probe duration of 150 ms.Citation
Physics Review Letters
Pub Type
Journals
Download Paper
Keywords
laser cooling, optical clock
Citation
Issues
If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.
Created February 3, 2017, Updated June 2, 2021