James Hartle

James Hartle is a theoretical physicist known for his work on the nature of the universe, time, and quantum mechanics. He helped develop models explaining how the universe might have begun, blending ideas from quantum theory—describing very tiny particles—and cosmology—the study of the universe’s origin and structure. His contributions include the Hartle-Hawking state, a concept proposing that the universe has no boundary in time, meaning it didn’t have a specific start point. His work aims to deepen our understanding of the universe’s earliest moments and its fundamental nature through combining physics and cosmology.