Initial conditions for plateau inflation: a case study

Tenkanen, Tommi; Tomberg, Eemeli

doi:10.1088/1475-7516/2020/04/050

Cited by 46 publications

(36 citation statements)

References 110 publications

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“…practically independent of N . As the energy scale of inflation is V 1/4 /M P ∼ r 1/4 , this allows one to construct models where inflation occurs at a very low energy scale [513,514].…”

Section: Constraints On Baryogenesis From Dilution By Reheatingmentioning

confidence: 99%

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

Allahverdi¹,

Amin²,

Berlin³

et al. 2021

TheOJA

Self Cite

194

140

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It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. While the abundance of light elements indicates that the Universe was radiation dominated during Big Bang Nucleosynthesis (BBN), there is scant evidence that the Universe was radiation dominated prior to BBN. It is therefore possible that the cosmological history was more complicated, with deviations from the standard radiation domination during the earliest epochs. Indeed, several interesting proposals regarding various topics such as the generation of dark matter, matter-antimatter asymmetry, gravitational waves, primordial black holes, or microhalos during a nonstandard expansion phase have been recently made. In this paper, we review various possible causes and consequences of deviations from radiation domination in the early Universe -taking place either before or after BBN -and the constraints on them, as they have been discussed in the literature during the recent years.

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“…practically independent of N . As the energy scale of inflation is V 1/4 /M P ∼ r 1/4 , this allows one to construct models where inflation occurs at a very low energy scale [513,514].…”

Section: Constraints On Baryogenesis From Dilution By Reheatingmentioning

confidence: 99%

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

Allahverdi¹,

Amin²,

Berlin³

et al. 2021

TheOJA

Self Cite

194

140

View full text Add to dashboard Cite

show abstract

“…The choice of the parameters 6 α = 10 7 and λ = 10 −13 are such that they reproduce the observable value of the scalar power spectrum, as was also noted in [44,46,49]. If we allow for the case of varying α, while keeping the other two parameters β and λ at constant values, we obtain the following table.…”

Section: (47)mentioning

confidence: 90%

Constant-roll in the Palatini-R² models

Antoniadis

Lykkas

Tamvakis

2020

J. Cosmol. Astropart. Phys.

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We consider models of a scalar field coupled to quadratic R+R 2 gravity in the framework of the Palatini formulation. The resulting Einstein-frame generalized k-inflation effective theory is analyzed assuming that the constant-roll condition holds. We focus on a quartic selfinteraction potential, a case of particular appeal modelling Higgs inflation, considering the cases of minimal and non-minimal coupling of the inflaton to gravity. For an appropriate range of the model parameters in the large field domain the obtained values for the inflationary observables are found in agreement with current observations.

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“…The non-trivial symmetry-breaking Higgs vacuum is dynamically generated in the post-inflationary epoch. This mechanism is different from another widely discussed scenario where the Higgs field pushes the inflation in the "early" universe through a non-minimal coupling to gravity [86][87][88][89][90][91][92][93][94][95][96][97][98][99][100].…”

Section: Introductionmentioning

confidence: 93%

Quintessential Inflation with Dynamical Higgs Generation as an Affine Gravity

Benisty¹,

Guendelman²,

Nissimov³

et al. 2020

Preprint

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First, we propose a scale-invariant modified gravity interacting with a neutral scalar inflaton and a Higgs-like SU(2)xU(1) iso-doublet scalar field based on the formalism of non-Riemannian (metric-independent) spacetime volume-elements. This model describes in the physical Einstein frame a quintessential inflationary scenario driven by the "inflaton" together with gravity-inflaton assisted dynamical spontaneous SU(2)xU(1) symmetry breaking in the post-inflationary universe, whereas SU(2)xU(1) symmetry remains intact in the inflationary epoch. Next, we find the explicit representation of the latter quintessential inflationary model with a dynamical Higgs effect as an Eddington-type purely affine gravity.

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Initial conditions for plateau inflation: a case study

Cited by 46 publications

References 110 publications

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

Constant-roll in the Palatini-R² models

Quintessential Inflation with Dynamical Higgs Generation as an Affine Gravity

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Initial conditions for plateau inflation: a case study

Cited by 46 publications

References 110 publications

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

Constant-roll in the Palatini-R2 models

Quintessential Inflation with Dynamical Higgs Generation as an Affine Gravity

Contact Info

Product

Resources

About

Constant-roll in the Palatini-R² models