Islands in Closed and Open Universes
High Energy Physics - Theory
2022-04-27 v1
Abstract
We show that spatial curvature has a significant effect on the existence of entanglement islands in cosmology. We consider a homogeneous, isotropic universe with thermal radiation purified by a reference spacetime. Arbitrarily small positive curvature guarantees that the entire universe is an island. Proper subsets of the time-symmetric slice of a closed or open universe can be islands, but only if the cosmological constant is negative and sufficiently large in magnitude.
Cite
@article{arxiv.2202.05278,
title = {Islands in Closed and Open Universes},
author = {Raphael Bousso and Elizabeth Wildenhain},
journal= {arXiv preprint arXiv:2202.05278},
year = {2022}
}
Comments
23 pages, 7 figures