Towards a Lithium quantum gas microscope for low-temperature Fermi-Hubbard physics

Quantum gas microscopes are a versatile tool to study the Fermi–Hubbard model in flexible lattice geometries and in temperature regimes that are at the limits of (or surpassing) current numerical methods. Here we report on ongoing efforts to develop a next-generation lithium-6 quantum gas microscope aimed at accessing state-of-the-art temperatures and more versatile lattice configurations. In particular, we seek to mitigate fermionic hole heating through a carefully engineered vacuum system and the use of further-detuned trapping potentials, which may enable temperatures below those currently achieved in existing quantum gas microscope platforms. In parallel, we are developing flexible trapping potentials by designing more versatile super-lattice schemes and combining incoherent light sources with multiple types of spatial light modulators. This approach is intended to facilitate the study of extended Fermi–Hubbard models, including next-nearest neighbor tunneling and multi-band models, while preserving the ability to implement entropy-redistribution techniques for the preparation of low-entropy states and single-shot spin readout to access to more observables.