Results 31 to 40 of about 691 (230)
Energy conditions allow eternal inflation [PDF]
, 2021 Eternal inflation requires upward fluctuations of the energy in a Hubble volume, which appear to violate the energy conditions. In particular, a scalar field in an inflating spacetime should obey the averaged null energy condition, which seems to rule ...
Olum, K.D., Kontou, E.-A.
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Journal of High Energy Physics, 2021 We consider multiverse models in two-dimensional linear dilaton-gravity theories as toy models of false vacuum eternal inflation. Coupling conformal matter we calculate the Von Neumann entropy of subregions. When these are sufficiently large we find that
Sergio E. Aguilar-Gutierrez +4 more
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Holography and eternal inflation [PDF]
Physical Review D, 2004 14 pages, 3 figures, revtex4, (v2 relation with work of Banks and Fischler clarified, references added)
Lowe, David A., Marolf, Donald
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Statistics of inflating regions in eternal inflation [PDF]
Physical Review D, 2019 14 pages in double column format, 16 figures. V2: Included details on distribution of non-inflating regions.
Jain, Mudit, Hertzberg, Mark P.
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Eternal inflation in swampy landscapes [PDF]
Journal of Cosmology and Astroparticle Physics, 2020 The much-discussed swampland conjectures suggest significant constraints on the properties of string theory landscape and on the nature of the multiverse that this landscape can support. The conjectures are especially constraining for models of inflation; in particular, they exclude the existence of de Sitter (dS) vacua.
Blanco-Pillado, Jose J. +2 more
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QCD axion window and false vacuum Higgs inflation
Journal of High Energy Physics, 2020 The abundance of the QCD axion is known to be suppressed if the Hubble parameter during inflation, H inf , is lower than the QCD scale, and if the inflation lasts sufficiently long.
Hiroki Matsui +2 more
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Islands and the de Sitter entropy bound
Journal of High Energy Physics, 2022 The de Sitter (dS) entropy bound gives the maximal number of e-folds that non-eternal inflation can last before violating the thermodynamical interpretation of dS space.
Daniele Teresi
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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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