## Video URL

http://pirsa.org/23050039# What does quantum gravity tell us about the puzzles of cosmology?"

### APA

Mathur, S. (2023). What does quantum gravity tell us about the puzzles of cosmology?". Perimeter Institute for Theoretical Physics. http://pirsa.org/23050039

### MLA

Mathur, Samir. What does quantum gravity tell us about the puzzles of cosmology?". Perimeter Institute for Theoretical Physics, May. 16, 2023, http://pirsa.org/23050039

### BibTex

@misc{ scivideos_PIRSA:23050039, doi = {}, url = {http://pirsa.org/23050039}, author = {Mathur, Samir}, keywords = {Cosmology}, language = {en}, title = {What does quantum gravity tell us about the puzzles of cosmology?"}, publisher = {Perimeter Institute for Theoretical Physics}, year = {2023}, month = {may}, note = {PIRSA:23050039 see, \url{https://scivideos.org/PIRSA/23050039}} }

Samir Mathur Ohio State University

## Abstract

Cosmology presents some puzzling aspects: the cosmological constant, the nature of the big bang, the source of inflation, and perhaps the tension in Hubble constant values. One normally uses standard effective field theory to study cosmology. But we know that such an approach fails in black holes due to the information paradox. We will draw on lessons on black holes to see how quantum gravity effects can modify evolution on macroscopic scales, and that such effects may be important is resolving puzzles in cosmology.

Zoom link: https://pitp.zoom.us/j/98085421952?pwd=NFBCWXNBNkhrTVpaRkRlOWRtSkczdz09