High-contrast double Bragg interferometry via detuning control
Abstract
We propose high-contrast Mach-Zehnder atom interferometers based on double Bragg diffraction (DBD) operating under external acceleration. To mitigate differential Doppler shifts and experimental imperfections, we introduce a tri-frequency laser scheme with dynamic detuning control. We evaluate four detuning-control strategies-conventional DBD, constant detuning, linear detuning sweep (DS-DBD), and a hybrid protocol combining detuning sweep with optimal control theory (OCT)-using exact numerical simulations and a five-level S-matrix model. The OCT strategy provides the highest robustness, maintaining contrast above 95\% under realistic conditions, while the DS-DBD strategy sustains contrast above 90\% for well-collimated Bose-Einstein condensates. These results offer practical pathways to high-contrast, large-momentum-transfer DBD-based interferometers for precision quantum sensing and fundamental physics tests.
Cite
@article{arxiv.2508.10968,
title = {High-contrast double Bragg interferometry via detuning control},
author = {Rui Li and Víctor José Martínez-Lahuerta and Naceur Gaaloul and Klemens Hammerer},
journal= {arXiv preprint arXiv:2508.10968},
year = {2026}
}
Comments
7 pages, 6 figures