Quadrature photonic spatial Ising machine

As a computing accelerator, a large-scale photonic spatial Ising machine has great advantages and potential due to its excellent scalability and compactness. However, the current fundamental limitation of a photonic spatial Ising machine is the configuration flexibility for problem implementation in the accelerator model. Arbitrary spin interactions are highly desired for solving various non-deterministic polynomial (NP)-hard problems. In this paper, we propose a novel quadrature photonic spatial Ising machine to break through the limitation of the photonic Ising accelerator by synchronous phase manipulation in two sections. The max-cut problem solution with a graph order of 100 and density from 0.5 to 1 is experimentally demonstrated after almost 100 iterations. Our work suggests flexible problem solving by the large-scale photonic spatial Ising machine. (C) 2022 Optica Publishing Group

Automated summary

In this paper, a novel quadrature photonic spatial Ising machine is proposed to overcome the limitation of the photonic Ising accelerator through synchronous phase manipulation. Experimental results demonstrate that this method can solve the max-cut problem with different densities and graph orders, providing possibilities for flexible problem solving by large-scale photonic spatial Ising machines.