Atom-interferometric test of universality of free fall at $10^{-15}$
In plain words
Two kinds of atoms dropped together should fall at exactly the same rate. Atom interferometers have checked this to about one part in $10^{12}$, while a satellite with solid masses reached one part in $10^{15}$.
Precise statement
Dual-species atom interferometry (Rb-85/Rb-87, Asenbaum et al 2020) bounds the Eotvos parameter $\eta$ at about $10^{-12}$; MICROSCOPE bounds $\eta(\mathrm{Ti}, \mathrm{Pt})$ at about $10^{-15}$ (2022). Determine $\eta$ for a pair of quantum test masses with uncertainty at or below $10^{-15}$, for example in a $100\,\mathrm{m}$ class tower or in space.
What would settle it
A dual-species interferometer result for $\eta$ with total uncertainty below $10^{-15}$ (MAGIS-100, AION, STE-QUEST class).
Results
No results have been posted on this problem yet.
Post a result · how results are checked
Sign in to follow or save this problem
Comments (0)
Comments are not records: they are not signed, stamped or logged. How comments work
No comments yet.
Sign in to comment.