Researchers at the University of Bristol took a big step towards building light-based quantum computers. Dr. Imad Faruque said "We demonstrated for the first time that nearly perfect single-photons can be generated from two parallel sources on the same silicon chip." The researchers claim they were able to generate identical photons about 92% of the time. Reliably generating pairs of identical photons is essential to processing large amounts of quantum information, and doing so on silicon brings the tech closer to commercial viability. Researchers have developed optical quantum circuits on silicon before, and the full research paper can be found here. "Our experiment has experimentally demonstrated that this is feasible for the first time. This demonstration marks a major step in quantum computing in silicon with photons and clears the way for a rapid increase in the scale of quantum computing demonstrations that are possible. Although our demonstration is an important step, many more hurdles remain. Our next aim is to use the latest advances in source design to demonstrate that we can generate photons that are much closer to 100 percent identical than the 92 percent demonstrated so far."