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Inflation and eternal inflation [PDF]
Physics Reports, 2000 The basic workings of inflationary models are summarized, along with the arguments that strongly suggest that our universe is the product of inflation. The mechanisms that lead to eternal inflation in both new and chaotic models are described. Although the infinity of pocket universes produced by eternal inflation are unobservable, it is argued that ...
Alan H. Guth +19 more
core +7 more sources
Eternal inflation: The inside story [PDF]
Physical Review D, 2006 Motivated by the lessons of black hole complementarity, we develop a causal patch description of eternal inflation. We argue that an observer cannot ascribe a semiclassical geometry to regions outside his horizon, because the large-scale metric is governed by the fluctuations of quantum fields.
Bousso, Raphael +2 more
core +6 more sources
Holographic Probabilities in Eternal Inflation [PDF]
Physical Review Letters, 2006 In the global description of eternal inflation, probabilities for vacua are notoriously ambiguous. The local point of view is preferred by holography and naturally picks out a simple probability measure. It is insensitive to large expansion factors or lifetimes, and so resolves a recently noted paradox.
Bousso, Raphael
core +9 more sources
Is brane inflation eternal? [PDF]
Journal of Cosmology and Astroparticle Physics, 2006 In this paper, we show that eternal inflation of the random walk type is generically absent in the brane inflationary scenario. Depending on how the brane inflationary universe originated, eternal inflation of the false vacuum type is still quite possible.
Chen, Xingang +3 more
openaire +6 more sources
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
openaire +3 more sources
Is noncommutative eternal inflation possible? [PDF]
Journal of Cosmology and Astroparticle Physics, 2007 We investigate the condition for eternal inflation to take place in the noncommutative spacetime. We find that the possibility for eternal inflation's happening is greatly suppressed in this case. If eternal inflation cannot happen in the low energy region where the noncommutativity is very weak (the UV region), it will never happen during the whole ...
Cai, Yi-Fu, Wang, Yi
core +8 more sources
Measure problem for eternal and non-eternal inflation [PDF]
Journal of Cosmology and Astroparticle Physics, 2010 We study various probability measures for eternal inflation by applying their regularization prescriptions to models where inflation is not eternal. For simplicity we work with a toy model describing inflation that can interpolate between eternal and non-eternal inflation by continuous variation of a parameter. We investigate whether the predictions of
Linde, Andrei, Noorbala, Mahdiyar
openaire +3 more sources
Corpuscular consideration of eternal inflation [PDF]
The European Physical Journal C, 2015 10 pages, 2 figures; revised version to match submitted ...
Kühnel, Florian, Sandstad, Marit
openaire +4 more sources
Eternal inflation and swampland conjectures [PDF]
Physical Review D, 2019 We study if eternal inflation is realized while satisfying the recently proposed string Swampland criteria concerning the range of scalar field excursion, $| | < \mathcal{D} \cdot M_{\rm P}$, and the potential gradient, $|\nabla V| > c \cdot V/M_{\rm P}$, where $\mathcal{D}$ and $c$ are constants of order unity, and $M_{\rm P}$ is the reduced ...
Matsui, Hiroki, Takahashi, Fuminobu
openaire +6 more sources
Spatial curvature falsifies eternal inflation [PDF]
Journal of Cosmology and Astroparticle Physics, 2012 Inflation creates large-scale cosmological density perturbations that are characterized by an isotropic, homogeneous, and Gaussian random distribution about a locally flat background. Even in a flat universe, the spatial curvature measured within one Hubble volume receives contributions from long wavelength perturbations, and will not in general be ...
Kleban, Matthew, Schillo, Marjorie
openaire +3 more sources