Results 31 to 40 of about 294,506 (220)
Physics Letters B, 2020 In this paper we put forward the idea that the comoving Hubble horizon undergoes multiple stages of contraction (a.k.a. inflationary phase) and expansion. The observable inflation, that produces the CMB anisotropies and generates primordial gravitational
Mahdi Torabian
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Stochastic inflation with an extremely large number of e-folds
Physics Letters B, 2020 We propose a class of single-field, slow-roll inflation models in which a typical number of e-folds can be extremely large. The key point is to introduce a very shallow local minimum near the top of the potential in a hilltop inflation model.
Naoya Kitajima +2 more
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Langevin analysis of eternal inflation [PDF]
Physical Review D, 2005 22 pages, 2 ...
Gratton, Steven, Turok, Neil
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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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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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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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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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Mathematical issues in eternal inflation [PDF]
Classical and Quantum Gravity, 2015 In this paper, we consider the problem of existence and uniqueness of solutions to the Einstein field equations for a spatially flat FLRW universe in the context of stochastic eternal inflation where the stochastic mechanism is modelled by adding a stochastic forcing term representing Gaussian white noise to the Klein-Gordon equation.
Kohli, Ikjyot Singh, Haslam, Michael C.
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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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Prescription for probabilities in eternal inflation [PDF]
Physical Review D, 2001 15 pages, 5 ...
Garriga Torres, Jaume +1 more
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