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Optical Atomic Clock Comparison through Turbulent Air
- Source :
- Phys. Rev. Research 2, 033395 (2020)
- Publication Year :
- 2020
-
Abstract
- We use frequency comb-based optical two-way time-frequency transfer (O-TWTFT) to measure the optical frequency ratio of state-of-the-art ytterbium and strontium optical atomic clocks separated by a 1.5 km open-air link. Our free-space measurement is compared to a simultaneous measurement acquired via a noise-cancelled fiber link. Despite non-stationary, ps-level time-of-flight variations in the free-space link, ratio measurements obtained from the two links, averaged over 30.5 hours across six days, agree to $6\times10^{-19}$, showing that O-TWTFT can support free-space atomic clock comparisons below the $10^{-18}$ level.
- Subjects :
- Physics - Optics
Physics - Instrumentation and Detectors
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Research 2, 033395 (2020)
- Publication Type :
- Report
- Accession number :
- edsarx.2006.01306
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevResearch.2.033395