Researchers developed a method called 'patch routing' for quantum computers. It breaks a big materials simulation into small local pieces, encodes each piece once, and then routes that work across the whole lattice. The costly step no longer grows with system size, cutting simulation cost substantially.
Simulating quantum materials on quantum computers is expensive, and cost is the main barrier to useful applications. The method cut the leading runtime cost by 15-17 times for a large frustrated Heisenberg model, 5 times for a spin liquid, and 3 times for the Fermi-Hubbard model. That moves fault-tolerant simulations of real materials closer to feasible.
✦ Pay once locally, route everywhere: cheaper quantum simulations of real materials.