The Coherent Ising Machine (CIM) being developed by NTT Research is a hybrid classical and quantum machine based on photonic circuits. It uses a network of optical parametric oscillators (OPOs) programmed to solve problems that have been mapped to an Ising model, a mathematical abstraction of magnetic systems composed of competitively interacting spins or angular momentums of fundamental particles. While many companies are taking a gate-based approach to quantum computing, the CIM relies on physics-based processing. Rather than using local coherence through entangled qubits, it uses natural global coherence. This needs new optical technologies such as nanometre manufacturing of Thin-Film Lithium Niobate (TFLN) devices. Squeezed light for photonic quantum computing … (eenewseurope.com)