What is recorded here?
Albers and colleagues compared the free-fall acceleration of simultaneously operated rubidium-87 and potassium-39 matter-wave interferometers. After correcting estimated systematic shifts, they reported an Eötvös ratio of −1.9 × 10⁻⁷ with combined standard uncertainty 3.2 × 10⁻⁷, consistent with equal acceleration within that uncertainty.
Source-linked catalogue note. A detailed explanatory guide has not yet been prepared for this entry.
Scientific scope
The experiment tests the particular atomic species and apparatus at the stated sensitivity; it does not prove the full equivalence principle or quantum gravity. The authors estimate a Zeeman correction of −1.3 × 10⁻⁶ and a dominant 3 × 10⁻⁷ wavefront-aberration uncertainty based on optical modeling; their reported combined uncertainty assumes systematic contributions are uncorrelated at the stated level. Statistical instability is 9 × 10⁻⁸ after 8192 seconds, not the total uncertainty. Earlier 2014 measurements with the same species and proposed future sensitivities are distinct from this improved 2020 result. Raw measurements and numerical sensitivity models were not independently replayed.
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People and systems
Henning Albers; Alexander Herbst; Logan L. Richardson; Hendrik Heine; Dipankar Nath; Jonas Hartwig; Christian Schubert; Christian Vogt; Marian Woltmann; Claus Lämmerzahl; Sven Herrmann; Wolfgang Ertmer; Ernst M. Rasel; Dennis Schlippert
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English catalogue narrative
Simultaneous rubidium and potassium atom-interferometer test of free fall
Albers and colleagues compared the free-fall acceleration of simultaneously operated rubidium-87 and potassium-39 matter-wave interferometers. After correcting estimated systematic shifts, they reported an Eötvös ratio of −1.9 × 10⁻⁷ with combined standard uncertainty 3.2 × 10⁻⁷, consistent with equal acceleration within that uncertainty.
Scientific scope
The experiment tests the particular atomic species and apparatus at the stated sensitivity; it does not prove the full equivalence principle or quantum gravity. The authors estimate a Zeeman correction of −1.3 × 10⁻⁶ and a dominant 3 × 10⁻⁷ wavefront-aberration uncertainty based on optical modeling; their reported combined uncertainty assumes systematic contributions are uncorrelated at the stated level. Statistical instability is 9 × 10⁻⁸ after 8192 seconds, not the total uncertainty. Earlier 2014 measurements with the same species and proposed future sensitivities are distinct from this improved 2020 result. Raw measurements and numerical sensitivity models were not independently replayed.
Reading status
This is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.
People and systems
Henning Albers; Alexander Herbst; Logan L. Richardson; Hendrik Heine; Dipankar Nath; Jonas Hartwig; Christian Schubert; Christian Vogt; Marian Woltmann; Claus Lämmerzahl; Sven Herrmann; Wolfgang Ertmer; Ernst M. Rasel; Dennis Schlippert
These are the listed authors of the cited contribution sources. Paper authorship does not quantify individual effort. An incomplete list is explicitly marked; same names are not automatically merged.