Islands in Bianchi type-I Universe
High Energy Physics - Theory
2025-02-03 v3 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
We study the conditions for finding an island in an anisotropic universe - Bianchi Type-I filled with radiation. We verify that the existence of islands does not depend on their shape. We then find that islands may form at certain times, near the turnaround point - where the universe turns from contraction to expansion in one of the directions. This is in line with previous analyses regarding cosmological space-times where islands form if one has two energy scales in the problem, such as the typical temperature of the universe and, on top of that, cosmological constant, curvature, anisotropy, or some mass scale.
Keywords
Cite
@article{arxiv.2409.15425,
title = {Islands in Bianchi type-I Universe},
author = {Ido Ben-Dayan and Merav Hadad and Ayushi Srivastava},
journal= {arXiv preprint arXiv:2409.15425},
year = {2025}
}
Comments
Matches the published version