Islands in Bianchi type i universe

Ido Ben-Dayan; Merav Hadad; Ayushi Srivastava

doi:https://doi.org/10.1103/PhysRevD.111.046015

Islands in Bianchi type i universe

Ido Ben-Dayan, Merav Hadad, Ayushi Srivastava

Research output: Contribution to journal › Article › peer-review

Abstract

We study the conditions for finding an island in an anisotropic universe - Bianchi type I universe 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 other mass scale.

Original language	American English
Article number	046015
Journal	Physical review D
Volume	111
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevD.111.046015
State	Published - 15 Feb 2025
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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https://doi.org/10.1103/PhysRevD.111.046015

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N2 - We study the conditions for finding an island in an anisotropic universe - Bianchi type I universe 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 other mass scale.

AB - We study the conditions for finding an island in an anisotropic universe - Bianchi type I universe 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 other mass scale.

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Islands in Bianchi type i universe

Abstract

All Science Journal Classification (ASJC) codes

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