Fig. 8: Evolution of the second harmonic (SH) power, pump power, and magnetization during feedback optimization.
From: Large-scale Ising emulation with four body interaction and all-to-all connections
a The evolution of experimentally measured SH power (blue dashed curve) and pump (red solid curve) power with different iteration numbers, set to find the ground state of the Ising machine with α = −1, β = −0.5, and γ = −1. b The evolution of magnetization. c, d Similar results but with α = 1, β = −0.5, and γ = −1. Insets show the initial and final phase masks in each case, respectively, where the black and white pixels indicates the positive and negative orientated spins, respectively.
