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A: Fachverband Atomphysik

A 39: Poster – Precision Measurement (joint session Q/A)

A 39.2: Poster

Donnerstag, 5. März 2026, 17:00–19:00, Philo 2. OG

Unifying Sequential Bragg and Bloch Large-Momentum-Transfer Atom Interferometry — •Ashkan Alibabaei¹, Patrik Mönkeberg², Klemens Hammerer^2,3,4, and Naceur Gaaloul¹ — ¹Institut of Quantum Optics, Leibniz University Hannover, Germany — ²Institute für Theoretical physics, Leibniz University Hannover, Germany — ³Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, Innsbruck, Austria — ⁴Institute for Theoretical Physics, University of Innsbruck, Innsbruck, Austria

Large-momentum-transfer (LMT) techniques significantly enhance the sensitivity of atom interferometers. Although Bloch oscillations and sequential Bragg diffraction are widely used, they are typically treated as separate methods. We introduce a unified Floquet framework that encompasses both processes within a single theoretical description, enabling direct and systematic comparison. Using this approach, we analyse losses and dephasing and establish criteria for achieving their fundamental performance limits. The framework is validated through agreement with exact numerical simulations and recent state-of-the-art experimental results [Rodzinka et al., Nat Commun 15, 10281 (2024)], providing a robust foundation for optimizing future LMT implementations.

Keywords: Atom Interferometry; Sequential Bragg; Large Momentum Transfer; Bloch Oscillation; Floquet Physics