Details
| Original language | English |
|---|---|
| Article number | 043240 |
| Journal | Phys. Rev. Research |
| Volume | 2 |
| Issue number | 4 |
| Publication status | Published - 16 Nov 2020 |
Abstract
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In: Phys. Rev. Research, Vol. 2, No. 4, 043240, 16.11.2020.
Research output: Contribution to journal › Article › Research
}
TY - JOUR
T1 - Atom-interferometric test of the universality of gravitational redshift and free fall
AU - Ufrecht, Christian
AU - Pumpo, Fabio Di
AU - Friedrich, Alexander
AU - Roura, Albert
AU - Schubert, Christian
AU - Schlippert, Dennis
AU - Rasel, Ernst M.
AU - Schleich, Wolfgang P.
AU - Giese, Enno
PY - 2020/11/16
Y1 - 2020/11/16
N2 - Light-pulse atom interferometers constitute powerful quantum sensors for inertial forces. They are based on delocalised spatial superpositions and the combination with internal transitions directly links them to atomic clocks. Since classical tests of the gravitational redshift are based on a comparison of two clocks localised at different positions under gravity, it is promising to explore whether the aforementioned interferometers constitute a competitive alternative for tests of general relativity. Here we present a specific geometry which together with state transitions leads to a scheme that is concurrently sensitive to both violations of the universality of free fall and gravitational redshift, two premises of general relativity. The proposed interferometer does not rely on a superposition of internal states, but merely on transitions between them, and therefore generalises the concept of physical atomic clocks and quantum-clock interferometry. An experimental realisation seems feasible with already demonstrated techniques in state-of-the-art facilities.
AB - Light-pulse atom interferometers constitute powerful quantum sensors for inertial forces. They are based on delocalised spatial superpositions and the combination with internal transitions directly links them to atomic clocks. Since classical tests of the gravitational redshift are based on a comparison of two clocks localised at different positions under gravity, it is promising to explore whether the aforementioned interferometers constitute a competitive alternative for tests of general relativity. Here we present a specific geometry which together with state transitions leads to a scheme that is concurrently sensitive to both violations of the universality of free fall and gravitational redshift, two premises of general relativity. The proposed interferometer does not rely on a superposition of internal states, but merely on transitions between them, and therefore generalises the concept of physical atomic clocks and quantum-clock interferometry. An experimental realisation seems feasible with already demonstrated techniques in state-of-the-art facilities.
KW - quant-ph
KW - gr-qc
KW - physics.atom-ph
UR - http://www.scopus.com/inward/record.url?scp=85100620151&partnerID=8YFLogxK
U2 - 10.1103/PhysRevResearch.2.043240
DO - 10.1103/PhysRevResearch.2.043240
M3 - Article
VL - 2
JO - Phys. Rev. Research
JF - Phys. Rev. Research
IS - 4
M1 - 043240
ER -