Results 41 to 50 of about 691 (230)
Implication of the swampland distance conjecture on the Cohen–Kaplan–Nelson bound in de Sitter space
European Physical Journal C: Particles and Fields, 2022 The Cohen–Kaplan–Nelson (CKN) bound formulates the condition that black hole is not produced by the low energy effective field theory dynamics. In de Sitter space it also constrains the maximal size of the matter distribution to be smaller than the ...
Min-Seok Seo
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Defying eternal inflation in warm inflation with a negative running
, 2023 It was pointed out previously~\cite{Kinney:2014jya} that a sufficiently negative running of the spectral index of curvature perturbations from (ordinary i.e. cold) inflation is able to prevent eternal inflation from ever occurring.
Vicente, Gustavo S. +4 more
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Stochastic eternal inflation is in the swampland
Journal of High Energy Physics, 2019 We demonstrate that there is no controlled description of stochastic eternal inflation consistent with the refined swampland de Sitter conjecture.
Suddhasattwa Brahma, Sarah Shandera
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Conditions for (no) eternal inflation [PDF]
Journal of Cosmology and Astroparticle Physics, 2019 We construct analytic and numerical solutions of the Fokker-Planck equation that arises in the context of stochastic inflation. We use these solutions to derive necessary conditions for eternal inflation on the higher derivatives of the scalar field potential and examine the prospects for eternal inflation in a variety of popular models.
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Time-dependent quantum correlations in two-dimensional expanding spacetime
European Physical Journal C: Particles and Fields, 2021 In expanding universes, the entanglement entropy must be time-dependent because the background geometry changes with time. For understanding time evolution of quantum correlations, we take into account two distinct holographic models, the dS boundary ...
Chanyong Park
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Journal of High Energy Physics, 2020 We show how in a matrix inflationary model in which there is a non-minimal coupling between the matrix inflatons and gravity — hence dubbed Non-M-flation — some of the disadvantages of the minimal model can be avoided.
Amjad Ashoorioon, Kazem Rezazadeh
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A note on infinities in eternal inflation [PDF]
General Relativity and Gravitation, 2008 In some well-known scenarios of open-universe eternal inflation, developed by Vilenkin and co-workers, a large number of universes nucleate and thermalize within the eternally inflating mega-universe. According to the proposal, each universe nucleates at a point, and therefore the boundary of the nucleated universe is a space-like surface nearly ...
Ellis, George F. R., Stoeger, William R.
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De Sitter diagrammar and the resummation of time
Journal of High Energy Physics, 2020 Light scalars in inflationary spacetimes suffer from logarithmic infrared divergences at every order in perturbation theory. This corresponds to the scalar field values in different Hubble patches undergoing a random walk of quantum fluctuations, leading
Matthew Baumgart, Raman Sundrum
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De Sitter quantum breaking, swampland conjectures and thermal strings
Journal of High Energy Physics, 2021 We argue that under certain assumptions the quantum break time approach and the trans-Planckian censorship conjecture both lead to de Sitter swampland constraints of the same functional form.
Ralph Blumenhagen +2 more
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Predictions in Eternal Inflation [PDF]
, 2007 Invited review for a LNP volume on inflationary cosmology. Figures included. Cosmetic changes, references reformatted according to "apsrev" Bibtex style to avoid citation ordering problems.
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