Robust double Bragg diffraction via detuning control

authored by: Rui Li, V. J. Martínez-Lahuerta, S. Seckmeyer, Klemens Hammerer, Naceur Gaaloul
Abstract: We present a theoretical model and numerical optimization of double Bragg diffraction, a widely used technique in atom interferometry. We derive an effective two-level-system Hamiltonian based on the Magnus expansion in the so-called quasi-Bragg regime, where most Bragg-pulse atom interferometers operate. Furthermore, we extend the theory to a five-level description to account for Doppler detuning. Using these derived effective Hamiltonians, we investigate the impacts of AC-Stark shift and polarization errors on the double Bragg beam splitter, along with their mitigations through detuning control. Notably, we design a linear detuning sweep that demonstrates robust 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. This protocol achieves an average efficiency of 99.92% for samples with a finite momentum width of 0.05â kL within an extended polarization error range of up to 10%.
Organisation(s): Institute of Quantum Optics
Institute of Theoretical Physics
Type: Article
Journal: Physical Review Research
Volume: 6
ISSN: 2643-1564
Publication date: 04.12.2024
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: General Physics and Astronomy
Electronic version(s): https://doi.org/10.1103/PhysRevResearch.6.043236 (Access: Open)

BibTeX

@article{44c8fc0dd8944c26a2e395b6641d0035,
title = "Robust double Bragg diffraction via detuning control",
abstract = "We present a theoretical model and numerical optimization of double Bragg diffraction, a widely used technique in atom interferometry. We derive an effective two-level-system Hamiltonian based on the Magnus expansion in the so-called quasi-Bragg regime, where most Bragg-pulse atom interferometers operate. Furthermore, we extend the theory to a five-level description to account for Doppler detuning. Using these derived effective Hamiltonians, we investigate the impacts of AC-Stark shift and polarization errors on the double Bragg beam splitter, along with their mitigations through detuning control. Notably, we design a linear detuning sweep that demonstrates robust 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. This protocol achieves an average efficiency of 99.92% for samples with a finite momentum width of 0.05{\^a} kL within an extended polarization error range of up to 10%.",
author = "Rui Li and Mart{\'i}nez-Lahuerta, {V. J.} and S. Seckmeyer and Klemens Hammerer and Naceur Gaaloul",
note = "Publisher Copyright: {\textcopyright} 2024 authors.",
year = "2024",
month = dec,
day = "4",
doi = "10.1103/PhysRevResearch.6.043236",
language = "English",
volume = "6",
journal = "Physical Review Research",
issn = "2643-1564",
publisher = "American Physical Society",
number = "4",
}