A 2048-Spin Bulk Acoustic Wave Ising Machine for Number Partitioning and Sudoku
A time-multiplexed Ising machine built with two serial bulk acoustic wave delay lines supports 2,048 spins, all-to-all connectivity, and 15-bit coupling resolution. The authors report approximate MAX-CUT solutions in 341 ms, with potential sub-ms scaling using higher-frequency delay lines, and demonstrate number partitioning and Sudoku. They also report much higher thermal stability than state-of-the-art coherent Ising machines.
