Metadata
bibkey: bothwell2022redshift
authors: Tobias Bothwell; Colin J. Kennedy; Alexander Aeppli; Dhruv Kedar; John M. Robinson; Eric Oelker; Alexander Staron; Jun Ye
year: 2022
title: Resolving the gravitational redshift across a millimetre-scale atomic sample
doi: 10.1038/s41586-021-04349-7
url: https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933368
claim: Spatially resolved strontium clock measurements find a frequency gradient consistent with gravitational redshift within one millimetre-scale atomic sample.
strata_touched: []
license: citation-only
triage: anchor
Experimental scope of a local clock comparison
The primary paper is Nature 602 (2022), 420–424. Its abstract and the spatially resolved frequency analysis report a gravitational-redshift measurement within one millimetre-scale ultracold strontium sample. The abstract quotes fractional frequency measurement uncertainty . This is literature evidence for the stated laboratory clock comparison.
The experiment does not test a near-horizon suspension, a computational complexity bound, or a mapping from FIB probability mass to a spacetime lapse. The static exterior formulas and the conditional numerical resource application are separately described in Reall’s note.