Results 21 to 30 of about 294,506 (220)
Pre-inflation from the multiverse: can it solve the quadrupole problem in the cosmic microwave background? [PDF]
European Physical Journal C: Particles and Fields, 2018 We analyze a quantized toy model of a universe undergoing eternal inflation using a quantum-field-theoretical formulation of the Wheeler–DeWitt equation.
João Morais +3 more
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Eternal inflation and the quantum birth of cosmic structure [PDF]
European Physical Journal C: Particles and Fields, 2017 We consider the eternal inflation scenario of the slow-roll/chaotic type with the additional element of an objective collapse of the wave function. The incorporation of this new agent to the traditional inflationary setting might represent a possible ...
Gabriel León
doaj +2 more sources
Non-perpetual eternal inflation and the emergent de Sitter Swampland conjecture [PDF]
European Physical Journal C: Particles and FieldsWe introduce a novel correlation, $$n_{\text {s}}$$ n s - $$\Delta N$$ Δ N , connecting CMB parameters to the required total e-folds for eternal inflation. This correlation provides a robust tool for evaluating eternal (string) inflation models using CMB
Omer Guleryuz
doaj +2 more sources
Eternal Inflation with alpha'-Corrections
, 2005 Higher-order alpha'-corrections are a generic feature of type IIB string compactifications. In KKLT-like models of moduli stabilization they provide a mechanism of breaking the no-scale structure of the volume modulus. We present a model of inflation driven by the volume modulus of flux compactifications of the type IIB superstring.
Westphal, Alexander
openaire +4 more sources
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.
core +1 more source
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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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
doaj +1 more source
Defying eternal inflation in warm inflation with a negative running [PDF]
, 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
core +1 more source
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
doaj +1 more source
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
doaj +1 more source