Freiburg 2024 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 39: Precision Measurements II (joint session Q/A)
A 39.7: Vortrag
Freitag, 15. März 2024, 12:30–12:45, HS 1221
Simulation of atomic diffraction through a nanograting — •Matthieu Bruneau1,2, Charles Garcion1,2, Julien Lecoffre2, Quentin Bouton2, Eric Charron3, Gabriel Dutier2, and Naceur Gaaloul1 — 1Institut für Quantenoptik, Leibniz Universität Hannover, Germany — 2Laboratoire de physique des lasers, Université Sorbonne Paris Nord, Villetaneuse, France — 3Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d’Orsay, France
Recent advances in the field of cold atoms have made atomic interferometry a versatile and precise tool with various applications, particularly in fundamental physics experiments.
This contribution focuses on the modeling of an experiment involving the diffraction of cold metastable Argon atoms through a transmission nanograting at the Laboratoire de Physique des Lasers. The observed diffraction pattern in this experiment is intrinsically related to the dispersion forces between the atoms and the material. A numerical model of the experiment has been developed, and the influence of these forces has been thoroughly investigated.
The simulation is based on an efficient numerical solution of the time-dependant Schrödinger equation that overcomes the limitations of the more standard semi-classical approach. This methodology provides an accurate description of the diffraction pattern, allowing a Casmir-Polder force measurement beyond the state of the art.
This work is supported by DLR funds from the BMWi (50WM2250A-QUANTUS+).
Keywords: simulation; matter wave function; Casimir-polder; diffraction; nanostructure