Question: Name the American theoretical physicist, mathematician, and string theorist who has been professor at Columbia University since 1996 and who wrote the book 'The Hidden Reality' which explores the concept of the multiverse?
Sentence (from "The Hidden Reality"): The Hidden Reality: Parallel Universes and the Deep Laws of the Cosmos is a book by Brian Greene published in 2011 which explores the concept of the multiverse and the possibility of parallel universes.
Relevant evidence: Yes