`2022-02-01 16:45:00``2022-02-01 17:45:00``Colloquium - Samir Mathur (OSU) - The black hole information paradox``The black hole information paradox Prof. Samir Mathur The Ohio State University Virtual only Faculty Host: Jason (Tin-Lun) Ho Abstract: In 1975, Stephen Hawking showed that black holes radiate away in a manner that violates quantum theory. Starting in 1997, it was observed that black holes in string theory did not have the form expected from general relativity: in place of "empty space will all the mass at the center" , one finds a "fuzzball" where the mass is distributed throughout the interior of the horizon. This resolves the paradox, but opposition to this resolution came from groups who sought to extrapolate some ideas in holography. In 2009 it was shown, using some theorems from quantum information theory, that these extrapolations were incorrect, and the fuzzball structure was essential for resolving the puzzle. Opposition continued along different lines, with a postulate that information would leak out through wormholes. Recently, it was shown that this wormhole idea had some basic flaws, leaving the fuzzball paradigm as the natural resolution of Hawking's puzzle. Bio: See his CV here Please use the Zoom link below to attend virtually: https://osu.zoom.us/j/94858307115?pwd=K0JDMTROWVhIOUp6bU1sU0prZjNUZz09 Meeting ID: 948 5830 7115 Password: PRB1080``Virtual Zoom link below``OSU ASC Drupal 8``ascwebservices@osu.edu``America/New_York``public`

`2022-02-01 15:45:00``2022-02-01 16:45:00``Colloquium - Samir Mathur (OSU) - The black hole information paradox``The black hole information paradox Prof. Samir Mathur The Ohio State University Virtual only Faculty Host: Jason (Tin-Lun) Ho Abstract: In 1975, Stephen Hawking showed that black holes radiate away in a manner that violates quantum theory. Starting in 1997, it was observed that black holes in string theory did not have the form expected from general relativity: in place of "empty space will all the mass at the center" , one finds a "fuzzball" where the mass is distributed throughout the interior of the horizon. This resolves the paradox, but opposition to this resolution came from groups who sought to extrapolate some ideas in holography. In 2009 it was shown, using some theorems from quantum information theory, that these extrapolations were incorrect, and the fuzzball structure was essential for resolving the puzzle. Opposition continued along different lines, with a postulate that information would leak out through wormholes. Recently, it was shown that this wormhole idea had some basic flaws, leaving the fuzzball paradigm as the natural resolution of Hawking's puzzle. Bio: See his CV here Please use the Zoom link below to attend virtually: https://osu.zoom.us/j/94858307115?pwd=K0JDMTROWVhIOUp6bU1sU0prZjNUZz09 Meeting ID: 948 5830 7115 Password: PRB1080 ``Virtual Zoom link below``Department of Physics``physics@osu.edu``America/New_York``public`**The black hole information paradox**

Prof. Samir Mathur

The Ohio State University

*Virtual only*

Faculty Host: Jason (Tin-Lun) Ho

**Abstract**: In 1975, Stephen Hawking showed that black holes radiate away in a manner that violates quantum theory. Starting in 1997, it was observed that black holes in string theory did not have the form expected from general relativity: in place of "empty space will all the mass at the center" , one finds a "fuzzball" where the mass is distributed throughout the interior of the horizon. This resolves the paradox, but opposition to this resolution came from groups who sought to extrapolate some ideas in holography. In 2009 it was shown, using some theorems from quantum information theory, that these extrapolations were incorrect, and the fuzzball structure was essential for resolving the puzzle. Opposition continued along different lines, with a postulate that information would leak out through wormholes. Recently, it was shown that this wormhole idea had some basic flaws, leaving the fuzzball paradigm as the natural resolution of Hawking's puzzle.

**Bio**:

See his CV here

Please use the Zoom link below to attend virtually:

https://osu.zoom.us/j/94858307115?pwd=K0JDMTROWVhIOUp6bU1sU0prZjNUZz09

Meeting ID: **948 5830 7115**

Password: **PRB1080**