Fuzzballs, Firewalls and all that

          @misc{ scivideos_PIRSA:14110087,
            doi = {10.48660/14110087},
            url = {https://pirsa.org/14110087},
            author = {Mathur, Samir},
            keywords = {Strong Gravity},
            language = {en},
            title = {Fuzzballs, Firewalls and all that},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2014},
            month = {nov},
            note = {PIRSA:14110087 see, \url{https://scivideos.org/pirsa/14110087}}
          }
          

Abstract

Some 40 years ago Hawking showed that if the black hole has a smooth horizon, then information will be lost when the black hole radiates. In string theory black holes appear to have a complete set of `hair'; these black hole states are called fuzzballs, and they radiate like normal bodies with no information loss. It was recently argued that structure at the horizon will necessarily feel like a `firewall' to an infalling observer. We will show that this need not be the case, since one can have `fuzzball complementarity' where an approximately smooth horizon appears as a `dual' description.