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Q: Fachverband Quantenoptik und Photonik
Q 53: Matter Wave Interferometry II
Q 53.2: Vortrag
Donnerstag, 13. März 2025, 11:15–11:30, HS I
Robust Double Bragg Diffraction via Detuning Control — •Rui Li1,2, Victor Martinez-Lahuerta1, Stefan Seckmeyer1, Naceur Gaaloul1, Klemens Hammerer2, and QUANTUS-1 Team1,3,4 — 1Leibniz University Hanover, Institute of Quantum Optics, Hannover, Germany — 2Leibniz University Hanover, Institute of Theoretical Physics, Hannover, Germany — 3Humboldt-Universität zu Berlin, Institut für Physik, Berlin, Germany — 4University Bremen, Center of Applied Space Technology and Microgravity, Bremen, Germany
We present a new theoretical model and numerical optimization of double Bragg diffraction (DBD), a widely used technique in atom interferometry. Using the effective Hamiltonians derived in our theoretical model, we investigate the impacts of AC-Stark shift and polarization errors on the double Bragg beam-splitter efficiency, along with their mitigations through detuning control. Notably, we design a linear detuning sweep that demonstrates robust DBD efficiency exceeding 99.5% against polarization errors up to 8.5%. Moreover, we develop an artificial intelligence-aided optimal detuning control protocol, showcasing enhanced robustness against both polarization errors and Doppler effects. Recently, we have experimentally achieved the proposed detuning-sweep DBDs in the QUANTUS-1 BEC Laboratory situated in Bremen and have observed their enhanced efficiency and robustness compared to the traditional DBDs. Finally, we propose a construction of a full Mach-Zehnder type gravimeter using detuning-sweep DBD pulses for enhanced contrast.
Keywords: Atom Interferometry; Atomic Physics; Quantum Optics; Light-matter Interaction