Toward low-entropy states in the Fermi-Hubbard model with quantum gas microscopy

Ultracold atoms in optical lattices are a powerful platform for studying strongly correlated quantum systems. We study the repulsive Fermi-Hubbard model through quantum gas microscopy with fermionic Lithium-6 atoms in a square lattice. This technique allows for single-site resolved readout and manipulation, and has enabled us to achieve long-range antiferromagnetic order across our entire sample by performing entropy redistribution. Accessing intriguing phases in the Fermi-Hubbard model, requires development of new techniques for low-entropy quantum state preparation. Here we report on our low-noise interfering optical lattice, which offers dynamically tunable lattice geometry and allows for studies of the Fermi-Hubbard model in dimerized, honeycomb, and triangular lattices. This tunability can alternatively facilitate an adiabatic ramp from an ultra-low entropy initial state, prepared through entropy redistribution, toward strongly-correlated quantum phases. Another possible application of this interfering lattice is to provide simultaneous readout of both spin species.