Performance Comparison between Coherent Ising Machines and Quantum Annealer

Abstract

NTT has been developing a coherent Ising machine (CIM), which efficiently finds solutions to groundstate-search problems of the Ising model using a network of optical parametric oscillators. We introduce our recent experiment that compared the computational performance of CIMs (the one developed by NTT and another developed by Stanford University) with a quantum annealer, which solves the Isingmodel problems using superconducting devices.