Researchers develop a computer from an array of VCSELs with optical feedback

https://phys.org/news/2024-02-array-vcsels-optical-feedback.html

"mapping optimization problems onto Ising Hamiltonian efficiently von Neumann bottleneck in magnetism: minimizing system's total energy using collective state computing... light-based polarization state, phase, or amplitude encoding find correct solution leveraging interference and optical feedback, using vertical-cavity surface-emitting lasers, information encoded in linear polarization states with ea ch state corresponding to interactions between them, encode problem's structure...all-optical VCSEL-based computer architecture"