Closed universes in two dimensional gravity
High Energy Physics - Theory
2024-08-16 v3 General Relativity and Quantum Cosmology
Quantum Physics
Abstract
We study closed universes in simple models of two dimensional gravity, such as Jackiw-Teiteilboim (JT) gravity coupled to matter, and a toy topological model that captures the key features of the former. We find there is a stark contrast, as well as some connections, between the perturbative and non-perturbative aspects of the theory. We find rich semi-classical physics. However, when non-perturbative effects are included there is a unique closed universe state in each theory. We discuss possible meanings and interpretations of this observation.
Keywords
Cite
@article{arxiv.2402.00098,
title = {Closed universes in two dimensional gravity},
author = {Mykhaylo Usatyuk and Zi-Yue Wang and Ying Zhao},
journal= {arXiv preprint arXiv:2402.00098},
year = {2024}
}
Comments
v1: 25+16 pages, 13 figures; v2: references added; v3: published version