# Uptunneling to de Sitter

### APA

Mirbabayi, M. (2021). Uptunneling to de Sitter. Perimeter Institute. https://pirsa.org/21020034

### MLA

Mirbabayi, Mehrdad. Uptunneling to de Sitter. Perimeter Institute, Feb. 23, 2021, https://pirsa.org/21020034

### BibTex

@misc{ pirsa_21020034, doi = {10.48660/21020034}, url = {https://pirsa.org/21020034}, author = {Mirbabayi, Mehrdad}, keywords = {Cosmology}, language = {en}, title = {Uptunneling to de Sitter}, publisher = {Perimeter Institute}, year = {2021}, month = {feb}, note = {PIRSA:21020034 see, \url{https://pirsa.org}} }

Mehrdad Mirbabayi Institute for Advanced Study (IAS)

## Abstract

Motivated by the question of how inflation started, we propose a Euclidean preparation of an asymptotically AdS2 spacetime that contains an inflating dS2 bubble. The setup can be embedded in a four dimensional theory with a Minkowski vacuum and a false vacuum. AdS2 times 2-sphere approximate the near horizon geometry of a 4d near-extremal RN wormhole. Likewise, in the false vacuum the near-horizon geometry of a near-extremal black hole is approximately dS2 times 2-sphere. We interpret the Euclidean solution as describing the decay of an excitation inside the wormhole to a false vacuum bubble. The result is an inflating region inside a non-traversable asymptotically Minkowski wormhole.