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arXiv · 2112.03086

Characterization of an atom interferometer in the quasi-Bragg regime

Ashley Béguin·Tangui Rodzinka·Jacques Vigué·Baptiste Allard·Alexandre Gauguet
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Abstract

We provide a comprehensive study of ultra-cold atom diffraction by an optical lattice. We focus on an intermediate regime between the Raman-Nath and the Bragg regimes, the so-called quasi-Bragg regime. The experimental results are in a good agreement with a full numerical integration of the Schr\"odinger equation. We investigate the long pulse regime limited by a strong velocity selection and the short pulse regime limited by non-adiabatic losses. For each of these regimes, we estimate the multi-port features of the Bragg interferometers. Finally, we discuss the best compromise between these two regimes, considering the diffraction phase shift and the existence of parasitic interferometers.

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Ashley Béguin, Tangui Rodzinka, Jacques Vigué, Baptiste Allard, Alexandre Gauguet. 2021-12-06. Characterization of an atom interferometer in the quasi-Bragg regime. https://doi.org/10.1103/physreva.105.033302

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