# Resolution of the black hole information paradox: The Fuzzball Paradigm

### APA

Mathur, S. (2021). Resolution of the black hole information paradox: The Fuzzball Paradigm. Perimeter Institute. https://pirsa.org/21100023

### MLA

Mathur, Samir. Resolution of the black hole information paradox: The Fuzzball Paradigm. Perimeter Institute, Oct. 20, 2021, https://pirsa.org/21100023

### BibTex

@misc{ pirsa_PIRSA:21100023, doi = {10.48660/21100023}, url = {https://pirsa.org/21100023}, author = {Mathur, Samir}, keywords = {Quantum Gravity}, language = {en}, title = {Resolution of the black hole information paradox: The Fuzzball Paradigm}, publisher = {Perimeter Institute}, year = {2021}, month = {oct}, note = {PIRSA:21100023 see, \url{https://pirsa.org}} }

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**Subject**

We will begin by explaining the black hole information paradox, starting from first principles. We will then explain how computations in string theory yield a resolution of this paradox. When we make a bound state of strings and branes, then this bound state is found to swell up into a horizon sized `fuzzball'; this fuzzball radiates like a normal body without any information loss. The existence of these fuzzballs implies a new picture for the quantum gravitational vacuum, where the virtual fluctuations resemble the scale free fluctuations at a second order phase transition, rather than being confined to within the planck scale. We will see how this `vecro' picture of the vacuum might give a resolution to several puzzles we face in cosmology, like the origin of energy needed for inflation and the existence of a cosmological constant.