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Classical and Quantum Gravity, 2010 It is now widely accepted that the universe as we understand it is accelerating in expansion and fits the de Sitter model rather well. As such, a realistic assumption of black holes must place them on a de Sitter background and not Minkowski as is ...
Akcay, Sarp, Matzner, Richard
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Holographic de Sitter Universe [PDF]
Journal of High Energy Physics, 2011 We propose to embed de Sitter space into five dimensional anti-de Sitter space to compute some physical quantities of interest, using the AdS/CFT correspondence.
Li, Miao, Pang, Yi
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A closed universe: de Sitter cosmic gate
Physics Letters B, 2022 A new cosmological object in analogy with the concept of a wormhole in general relativity is introduced. As wormholes connect two distant points through a tunnel in spacetime, this new object connects two spacetime through a large mouth which is referred
S. Danial Forghani +1 more
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"Massless" vector field in de Sitter Universe [PDF]
Journal of Mathematical Physics, 2006 In the present work the massless vector field in the de Sitter (dS) space has been quantized. "Massless" is used here by reference to conformal invariance and propagation on the dS light-cone whereas "massive" refers to those dS fields which contract at ...
Chernikov N. A. +10 more
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When Painlevé–Gullstrand coordinates fail [PDF]
European Physical Journal C: Particles and Fields, 2020 Painlevé–Gullstrand coordinates, a very useful tool in spherical horizon thermodynamics, fail in anti-de Sitter space and in the inner region of Reissner–Nordström.
Valerio Faraoni, Geneviève Vachon
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Quantum Annihilation of Anti- de Sitter Universe [PDF]
Physics Letters B, 2000 We discuss the role of conformal matter quantum effects (using large $N$ anomaly induced effective action) to creation-annihilation of an Anti-de Sitter Universe. The arbitrary GUT with conformally invariant content of fields is considered.
Brevik +6 more
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Particles of a de Sitter Universe
Universe, 2023 The de Sitter spacetime is a maximally symmetric spacetime. It is one of the vacuum solutions to Einstein equations with a cosmological constant. It is the solution with a positive cosmological constant and describes a universe undergoing accelerated ...
Gizem Şengör
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Dilaton Black Holes in de Sitter or Anti-de Sitter Universe [PDF]
Physical Review D, 2004 Poletti and Wiltshire have shown that, with the exception of a pure cosmological constant, the solution of a dilaton black hole in the background of de Sitter or anti-de Sitter universe, does not exist in the presence of one Liouville-type dilaton ...
C. M. Hull +5 more
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Nothing into Something and Vice Versa: A Cosmological Scenario
Universe, 2023 In the almost empty universe (with almost no matter in it), stochastic gravitational waves (SGW) of finite amplitude produce a de Sitter regime as a solution, which is invariant with respect to the Wick rotation. Asymptotically, super horizon SGWs do not
Leonid Marochnik
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Revise the Phase-Space Analysis of the Dynamical Spacetime Unified Dark Energy Cosmology
Universe, 2023 We analyze the phase-space of an alternate scalar field cosmology that aims to combine the concepts of dark energy and the dark sector. The investigation focuses on stationary points within this phase-space, considering different functional forms of the ...
Andronikos Paliathanasis
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