Islands in Closed and Open Universes
arXiv:2202.05278 · doi:10.1103/PhysRevD.105.086012
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.
arXiv comment23 pages, 7 figures
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- Non-trivial saddles in microscopic description of black holes
- Cosmological Implications of Thermodynamic Split Conjecture
- Holography for de Sitter bubble geometries