Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 55: Matter Wave Optics
Q 55.6: Talk
Friday, March 13, 2020, 12:15–12:30, a310
An atom interferometer testing the gravitational redshift — •Christian Ufrecht1, Fabio Di Pumpo1, Alexander Friedrich1, Albert Roura2, Christian Schubert3, Dennis Schlippert3, Ernst M. Rasel3, Wolfgang P. Schleich1,2, and Enno Giese1 — 1Institut für Quantenphysik and Center for Integrated Quantum Science and Technology (IQST), Universität Ulm — 2Institute of Quantum Technologies, German Aerospace Center (DLR), Ulm — 3Institut für Quantenoptik, Leibnitz Universität Hannover
Light-pulse atom interferometers are based on
delocalized spatial superpositions and the combination with internal-state transitions directly links them to atomic
clocks. This property leads to the question whether such interferometer are sensitive to the gravitational redshift.
We present a specific geometry exploiting state transitions during the interferometer sequence which provides us with this sensitivity. In contrast to Ref. [1], the proposed scheme does not rely on a
superposition of internal states, but merely on transitions between them, and therefore generalizes the concept
of physical atomic clocks and quantum-clock interferometry.
[1] Roura, A., Gravitational redshift in quantum-clock interferometry, ArXiv:1810.06744 (2018)
The QUANTUS project is supported by the German Aerospace Center DLR with funds provided by the Federal Ministry for Economic Affairs and Energy (BMWi) under grant nos. DLR 50WM1556, 50WM1956