PIRSA:20040091

Baby Universes and Black Hole Information

Marolf, D. (2020). Baby Universes and Black Hole Information. Perimeter Institute. https://pirsa.org/20040091

Marolf, Donald. Baby Universes and Black Hole Information. Perimeter Institute, Apr. 09, 2020, https://pirsa.org/20040091 

          @misc{ pirsa_PIRSA:20040091,
            doi = {10.48660/20040091},
            url = {https://pirsa.org/20040091},
            author = {Marolf, Donald},
            keywords = {Quantum Gravity},
            language = {en},
            title = {Baby Universes and Black Hole Information},
            publisher = {Perimeter Institute},
            year = {2020},
            month = {apr},
            note = {PIRSA:20040091 see, \url{https://pirsa.org}}
          }

Donald Marolf

University of California, Santa Barbara

Talk number
PIRSA:20040091
Talk Type
Subject
Abstract

In the 1980’s, work by Coleman and by Giddings and Strominger linked the physics of spacetime wormholes to ‘baby universes’ and an ensemble of theories. We revisit such ideas, using features associated with a negative cosmological constant and asymptotically AdS boundaries to strengthen the results, introduce a change in perspective, and connect with recent replica wormhole discussions of the Page curve. A key new feature is an emphasis on the role of null states. We explore this structure in detail in simple topological models of the bulk that allow us to compute the full spectrum of associated boundary theories. We also argue that similar properties must hold in any consistent gravitational path integral.

Hosted By: Stanford University  Footage Courtesy: Simons Foundation for Mathematics and Physical Sciences