Raphael Bousso (/ˈbuːsoʊ/) (born 1971) is a theoretical physicist and cosmologist. He is a professor at the Berkeley Center for Theoretical Physics in the Department of Physics, UC Berkeley. He is known for the Bousso bound on the information content of the universe.[1][2][3] With Joseph Polchinski, Bousso proposed the string theory landscape as a solution to the cosmological constant problem.[4][5]