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Q: Fachverband Quantenoptik und Photonik
Q 50: Matter Wave Interferometry and Metrology II
Q 50.5: Talk
Thursday, March 5, 2026, 12:00–12:15, P 11
Unified Theory of Large Momentum Transfer in Optical Lattices — •Patrik Mönkeberg1, Ashkan Alibabaei2, Naceur Gaaloul2, and Klemens Hammerer1,3,4 — 1Institute for Theoretical Physics, Leibniz University of Hannover, Germany — 2Institute of Quantum Optics, Leibniz University of Hannover, Germany — 3Institute for Theoretical Physics, University of Innsbruck, Austria — 4Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, Innsbruck, Austria
Large-momentum-transfer techniques are essential tools to enhance the sensitivity of atom interferometers. So far, elastic scattering processes like Bloch oscillations and sequential Bragg diffractions have proven to be effective means of implementing large momentum transfer. To fully exploit the potential of these methods, an accurate theoretical description is crucial. In this work, we utilize a Floquet-theoretical approach to describe both Bloch oscillations and sequential Bragg diffractions as two special cases of a more general framework. We compare different regimes by analyzing losses and phases and offer criteria to reach the fundamental efficiency and accuracy limits. We verify the accuracy of our model through comparisons with exact numerical solutions of the Schrödinger equation and current state-of-the-art experiments [Rodzinka et al., Nat Commun 15, 10281 (2024)].
Keywords: Atom Interferometry; Large Momentum Transfer; Sequential Bragg Diffractions; Bloch Oscillations; Floquet Physics