TY - JOUR
T1 - Islands in Bianchi type i universe
AU - Ben-Dayan, Ido
AU - Hadad, Merav
AU - Srivastava, Ayushi
N1 - Publisher Copyright:
© 2025 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
PY - 2025/2/15
Y1 - 2025/2/15
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.
UR - http://www.scopus.com/inward/record.url?scp=85217246614&partnerID=8YFLogxK
U2 - 10.1103/PhysRevD.111.046015
DO - 10.1103/PhysRevD.111.046015
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AN - SCOPUS:85217246614
SN - 2470-0010
VL - 111
JO - Physical Review D
JF - Physical Review D
IS - 4
M1 - 046015
ER -