Soutenance de thèse de Sanghyeop LEE

Soutenance de thèse de Sanghyeop LEE, doctorant dans le groupe Gaz quantiques du Laboratoire Charles Fabry, le 30 novembre 2026 à 14h00 dans l'Auditorium de l'Institut d'Optique Graduate School de Palaiseau, sur le thème : "Site-resolved fluorescence imaging with a strontium quantum gas microscope".

Résumé : "In this dissertation, we describe the development and characterization of a new strontium quantum gas microscope for site-resolved studies of two-dimensional Bose-Hubbard physics. The long-term goal of the experiment is to investigate out-of-equilibrium dynamics in the quantum critical region of the two-dimensional Bose-Hubbard model. The envisioned protocol consists of preparing a quantum gas in optical lattices, quenching the lattice parameters, and measuring the propagation of density-density correlations in real space.

The main focus of this work is the implementation and understanding of site-resolved fluorescence imaging in optical lattices. On the experimental side, we describe the preparation of the two-dimensional confinement and lattice system required for imaging, the realization of site-resolved fluorescence imaging, and the characterization of the imaging performance of our setup.

On the theoretical side, we develop a framework to describe fluorescence imaging of a single atom confined in an optical trap using a narrow optical transition. This approach is used to understand the imaging in the high-saturation regime relevant to our experiment and to guide the optimization of the imaging parameters.

Together, these results establish the experimental and theoretical basis for future studies of Bose-Hubbard dynamics with site-resolved detection."