Large-scale analogue quantum simulation using atom dot arrays

In pursuit of a practical quantum advantage¹, analogue quantum systems provide an invaluable way to simulate the physics of quantum materials^2-4, quantum systems out of equilibrium^5,6 or interaction-induced localization⁷. Notable recent progress to realize such systems has been achieved in ultracold atoms^8-12, superconducting circuits^13-15 and twisted van der Waals materials^16-19. However, so far, these platforms have struggled to simulate large-scale strongly interacting fermionic systems at low temperatures, at which electronic correlations dominate materials properties and numerical simulations remain restricted in accuracy and scope^20,21. Here we demonstrate the realization of a new platform consisting of large-scale 2D arrays of sub-nanometre precision-engineered atom-based quantum dots (15,000 sites) to simulate strongly interacting, low-temperature physics. By observing a metal-insulator (MI) transition on a 2D square lattice of atom-based quantum dots, we demonstrate independent and precise control of the on-site interaction U and tunnelling t. Magneto-transport measurements further indicate the formation of an insulating state driven by Mott-Hubbard/Anderson physics and promising signatures of correlated electron physics. These precision-engineered analogue quantum simulators provide a unique platform to simulate quantum materials on arbitrary 2D lattices and to explore many unanswered questions in the formation of quantum magnetism, interacting topological quantum matter and unconventional superconductivity.