Spin-resolved single-site imaging of 2D homogeneous Lattices

The fermionic Hubbard model is a fundamental paradigm for investigating strongly correlated quantum matter, and realizing a Hubbard quantum simulator with ultracold Fermi atoms has long been a central experimental objective. Towards this goal, we have implemented a two-dimensional homogeneous lattice system, successfully establishing a large-scale, highly homogeneous quantum simulation platform for solving the fermionic Hubbard model. Leveraging this platform, we constructed a high-NA quantum gas microscopy system and integrated Raman sideband imaging to enable high-fidelity single-site readout of lattice-site occupation. We have currently achieved large-scale site-resolved imaging with a field of view exceeding 100×100 lattice sites and imaging fidelity surpassing 99%. Furthermore, by incorporating techniques such as bilayer imaging, we have realized spin-resolved single-site imaging, enabling us to directly measuring spin-spin correlations, capturing quantum many-body dynamics, and exploring strongly correlated phenomena.