Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 56: Poster VII
Q 56.11: Poster
Donnerstag, 14. März 2024, 17:00–19:00, KG I Foyer
Phase and error estimation of differential atom interferometry experiments on the ISS — •David B. Reinhardt1, Nicholas P. Bigelow2, Matthias Meister1, and the CUAS team1,2,3,4 — 1German Aerospace Center (DLR), Institute of Quantum Technologies, Ulm, Germany — 2Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA — 3Institut für Quantenphysik and Center for Integrated Quantum Science and Technology IQST, Ulm University, Ulm, Germany — 4Leibniz University Hannover, Institute of Quantum Optics, QUESTLeibniz Research School, Hanover, Germany
Matter-wave interferometers in space are excellent tools for high precision measurements, relativistic geodesy, or Earth observation. In differential interferometric setups common-mode noise can be suppresed and the differential phase enables the determination of magnetic field curvatures or gravity gradients. Precise estimation of the differential phase is therefore key as its error contributes significantly to the uncertainty of the whole measurement. If the ignorance about noise types is high and the number of measurements points is small the error estimation becomes severely more challenging. To tackle these issues, we present an improved ellipse fitting method for the estimation of phase, contrast, and population offset of differential interferometers as well as their errors using a modified least-square algorithm combined with bootstrapping of experimental data. Finally, we apply our new method to recent data from the CAL mission measuring magnetic field curvatures on the International Space Station.
Keywords: Atom Interferometry; Parameter Estimation; Precision Measurements; Cold Atoms in Space