Atom-interferometric test of universality of free fall at 10^-15 · revision history

Revision 2

Accepted · core change · record

Changes against revision 1:

Title · changed
Revision 1: Atom-interferometric test of universality of free fall at 1e-15
Revision 2: Atom-interferometric test of universality of free fall at $10^{-15}$
Plain
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 · changed · core
Revision 1: Dual-species atom interferometry (Rb-85/Rb-87, Asenbaum et al 2020) bounds the Eotvos parameter $\eta$ at about 1e-12; MICROSCOPE bounds $\eta(\mathrm{Ti}, \mathrm{Pt})$ at about 1e-15 (2022). Determine $\eta$ for a pair of quantum test masses with uncertainty at or below 1e-15, for example in a $100\,\mathrm{m}$ class tower or in space.
Revision 2: 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.
Settled by · changed · core
Revision 1: A dual-species interferometer result for $\eta$ with total uncertainty below 1e-15 (MAGIS-100, AION, STE-QUEST class).
Revision 2: A dual-species interferometer result for $\eta$ with total uncertainty below $10^{-15}$ (MAGIS-100, AION, STE-QUEST class).
Kind
well-posed
Answer type
value
References
(empty)
Literature status
open
Status note
(empty)
Posed since
(empty)

Decisions