Results 21 to 30 of about 49,682 (257)

How Generic Is Eternal Inflation?

open access: yesSci, 2022
Everlasting inflation has far-reaching implications for cosmology and the standing of self-localizing inferences made by observers, which have been subjects of renewed interest in light of the growing acceptance of theory landscapes and the attendant ...
Ross Greenwood, Anthony Aguirre
doaj   +1 more source

Inflation from supersymmetric quantum cosmology [PDF]

open access: yesPhysical Review D, 2010
14 pages, latex2e, To appear in Phys.
Socorro, J., D'Oleire, Marco
openaire   +2 more sources

Inflation in loop quantum cosmology [PDF]

open access: yesPhysical Review D, 2019
18 pages, 6 tables.
Bhardwaj, Anshuman   +2 more
openaire   +2 more sources

Reheating in holographic cosmology and connecting to Λ-MSSM constructions for particle physics

open access: yesJournal of High Energy Physics, 2021
In this paper we model the transition from the non-geometric holographic cosmology regime, to the usual radiation dominated (RD) cosmology, known as reheating in the case of (perturbative) inflation.
Horatiu Nastase
doaj   +1 more source

Reheating via gravitational particle production in simple models of quintessence or $\Lambda$CDM inflation [PDF]

open access: yes, 2017
We have tested some simple $\Lambda$CDM (the same test is also valid for quintessence) inflation models, imposing that they match with the recent observational data provided by the BICEP and Planck's team and leading to a reheating temperature, which is ...
Haro, Jaume, Saló, Llibert Aresté
core   +4 more sources

Cosmological perturbations without inflation [PDF]

open access: yesClassical and Quantum Gravity, 2016
A particularly attractive feature of inflation is that quantum fluctuations inthe inflaton field may have seeded inhomogeneities in the cosmic microwavebackground (CMB) and the formation of large-scale structure. In this paper,we demonstrate that a scalar field with zero active mass, i.e., with anequation of state $\rho+3p=0$, where $\rho$ and $p$ are ...
openaire   +4 more sources

Pre-Big-Bang in String Cosmology [PDF]

open access: yes, 1998
We compute the amount of inflation required to solve the horizon problem of cosmology in the pre-big-bang scenario. First we give a quick overview of string cosmology as developed by Veneziano and collaborators.
Borunda, Monica, Ruiz-Altaba, M.
core   +2 more sources

Inflation in the Rényi cosmology [PDF]

open access: yesModern Physics Letters A, 2019
The description of the accelerated phases for the current and primordial cosmos has been obtained in the framework of Rényi cosmology. The results show that corrections to the Friedmann equations, originated from differences between Rényi and Bekenstein entropies, can describe both the current accelerated and inflationary eras.
Moradpour, H.   +3 more
openaire   +2 more sources

Inflation and Alternatives with Blue Tensor Spectra

open access: yes, 2014
We study the tilt of the primordial gravitational waves spectrum. A hint of blue tilt is shown from analyzing the BICEP2 and POLARBEAR data. Motivated by this, we explore the possibilities of blue tensor spectra from the very early universe cosmology ...
Wang, Yi, Xue, Wei
core   +5 more sources

Inflation with a class of concave inflaton potentials in Randall–Sundrum model

open access: yesEuropean Physical Journal C: Particles and Fields, 2020
We investigate inflation with a class of concave inflaton potentials of the form $$\sim \phi ^n$$ ∼ϕn ...
Ngo Phuc Duc Loc
doaj   +1 more source

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