Bonn 2025 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 53: Matter Wave Interferometry II
Q 53.4: Talk
Thursday, March 13, 2025, 11:45–12:00, HS I
Simulation of atomic diffraction through a nanograting — •Matthieu Bruneau1,2, Julien Lecoffre1, Ayoub Hadi1, Charles Garcion1,2, Nathalie Fabre1, Eric Charron3, Gabriel Dutier1, Quentin Bouton1, and Naceur Gaaloul2 — 1Laboratoire de physique des lasers, Université Sorbonne Paris Nord, Villetaneuse, France — 2Institut für Quantenoptik, Leibniz Universität Hannover, Germany — 3Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d’Orsay, France
Tremendous advancements in cold atom physics have transformed atomic interferometry into a powerful tool for precision measurements.
This work models an experiment involving the diffraction of cold argon atoms through a transmission nanograting, where the observed pattern is intrinsically related to short-range Casimir-Polder (C-P) forces. Accurate modeling of these forces is critical for exploring non-Newtonian gravitational effects and advancing nanotechnology.
Using a quantum numerical model combined with QED calculations, we validate experimental data and achieve a state-of-the-art determination of the atom-surface potential strength parameter, C3 = 6.87 ± 1.18 meV·nm3. Sensitivity is constrained primarily by nanograting geometry. To enhance precision, we are implementing a scanning angle method and extending our 1D model to a 2D framework with new QED calculations to fully characterize the 2D C-P potential.
This work is supported by DLR funds from the BMWK (50WM2450A QUANTUS-VI).
Keywords: Casimir-Polder; Nanograting; Metrology