Founded by a co-creator of ChatGPT, Periodic Labs aims to build artificial intelligence that can accelerate discoveries in physics, chemistry and other fields.Ekin Dogus Cubuk, left, and Liam Fedus are the co-founders of the start-up Periodic Labs in San Francisco.Credit...Jason Henry for The New York TimesTop A.I. Researchers Leave OpenAI, Google and Meta for New Start-UpFounded by a co-creator of ChatGPT, Periodic Labs aims to build artificial intelligence that can accelerate discoveries in ph...