Coherent optical clock down-conversion for microwave frequencies with 10 −18 instability
Abstract
Timing standards around the world define the second using atomic clocks, specifically the microwave frequencies emitted from trapped atoms. Optical clocks, which are based on optical transitions of atoms, operate at much higher frequency and have been shown to exhibit better stability. Nakamura et al. demonstrate a framework that carries the improved stability of the optical domain over to microwaves (see the Perspective by Curtis). In addition to contributing to the eventual redefinition of the second based on optical clocks, this work will also lead to improvements in microwave-based technologies such as astronomical imaging and geodesy through very long baseline interferometry, radar, communications, and navigation systems.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 22, 2020
- Source ID
- 10.1126/science.abb2473
Entities
People
- Andrew D. Ludlow
- Daniele Nicolodi
- Franklyn Quinlan
- Holly Leopardi
- Jeff A Sherman
- Joe C. Campbell
- Josue Davila-rodriguez
- Kyle Beloy
- Scott A. Diddams
- Takuma Nakamura
- Tara M. Fortier
- William F. Mcgrew
- X. Zhang
- Xiaojun Xie
- Youssef S. Hassan
Organizations
- National Institute of Standards and Technology
- University of Colorado Boulder
- University of Virginia