Harnessing exciton-polaritons for digital computing, neuromorphiccomputing, and optimization [Invited]

Polaritons are quasiparticles resulting from the strong quantum coupling of light and matter. Peculiarproperties of polaritons are a mixture of physics usually restricted to one of these realms, making theminteresting for study not only from the fundamental point of view but also for applications. In recentyears, many studies have been devoted to the potential use of exciton-polaritons for computing. Veryrecently, it has been shown experimentally that they can be harnessed not only for digital computingbut also for optical neural networks and for optimization related to hard computational problems. Here,we provide a brief review of recent studies and the most important results in this area. We focus ourattention, in particular, on the emerging concepts of non-von-Neumann computing schemes and theirrealizations in exciton-polariton systems.