Measurement of the 27Al+ and 87Sr absolute optical frequencies
Abstract
We perform absolute measurement of the 27Al+ single-ion and 87Sr neutral lattice clock frequencies at the National Institute of Standards and Technology and JILA at the University of Colorado against a global ensemble of primary frequency standards. Over an eight month period multiple measurements yielded the mean optical atomic transition frequencies ν Al + = 1 121 015 393 207 859.50 ( 0.36 ) Hz and ν Sr = 429 228 004 229 873.19(0.15) Hz, where the stated uncertainties are dominated by statistical noise and gaps in the observation interval (‘dead-time’ uncertainty).
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 21, 2021
- Source ID
- 10.1088/1681-7575/abd040
Entities
People
- Andrew D. Ludlow
- Colin Kennedy
- Daniele Nicolodi
- David Hume
- David R. Leibrandt
- Dhruv Kedar
- Eric Oelker
- Holly Leopardi
- Jeff A Sherman
- Jian Yao
- John M. Robinson
- Jun Ye
- Jwo-sy Chen
- Kyle Beloy
- Lindsay Sonderhouse
- Robert J Fasano
- Samuel M. Brewer
- Sarah L Bromley
- Scott A. Diddams
- Stefania Romisch
- Tara M. Fortier
- Thomas E. Parker
- Tobias Bothwell
- William F. Mcgrew
- William R. Milner
- X. Zhang
- Youssef S. Hassan
Organizations
- Defense Advanced Research Projects Agency
- National Aeronautics and Space Administration