# New generalization of the simplest α -attractor T model

@article{Germn2021NewGO, title={New generalization of the simplest $\alpha$ -attractor T model}, author={Gabriel Germ{\'a}n}, journal={Physical Review D}, year={2021} }

The simplest α-attractor T model is given by the potential V = V0 tanh (λφ/Mpl). However its generalization to the class of models of the type V = V0 tanh (λφ/Mpl) is difficult to interpret as a model of inflation for most values of p. Keeping the basic model, we propose a new generalization, where the final potential is of the form V = V0(1 − sech(λφ/Mpl)), which does not present any of the problems that plague the original generalization, allowing a successful interpretation as a model of…

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## References

SHOWING 1-10 OF 41 REFERENCES

On the α-attractor T-models

- MathematicsJournal of Cosmology and Astroparticle Physics
- 2021

We carry out a fully analytical study of the phenomenology of α-attractor T-models defined by the potential V = V0tanhp(λϕ/M_pl). We obtain expressions for the number of e-folds during inflation Nke…

Non-slow-roll dynamics in α-attractors

- Mathematics
- 2015

In this paper we consider the α−attractor model and study inflation under a non-slow-roll dynamics. More precisely, we follow the approach recently proposed by Gong and Sasaki [1] by means of…

Dark energy, α-attractors, and large-scale structure surveys

- PhysicsJournal of Cosmology and Astroparticle Physics
- 2018

Over the last few years, a large family of cosmological attractor models has been discovered, which can successfully match the latest inflation-related observational data. Many of these models can…

Unity of cosmological inflation attractors.

- PhysicsPhysical review letters
- 2015

The aim of this Letter is to elucidate the common denominator of these attractors: their robust predictions stem from a joint pole of order 2 in the kinetic term of the inflaton field in the Einstein frame formulation prior to switching to the canonical variables.

Large field inflation and double α-attractors

- Mathematics
- 2014

A bstractWe consider a broad class of inflationary models that arise naturally in super-gravity. They are defined in terms of a parameter α that determines the curvature and cutoff of these models.…

The double attractor behavior of induced inflation

- Economics
- 2014

A bstractWe describe an induced inflation, which refers to a class of inflationary models with a generalized non-minimal coupling ξg(ϕ)R and a specific scalar potential. The defining property of…

Instant preheating in quintessential inflation with α-attractors

- Physics
- 2018

We investigate a compelling model of quintessential inflation in the context of α-attractors, which naturally result in a scalar potential featuring two flat regions; the inflationary plateau and the…

α-Attractors and reheating in a nonminimal inflationary model

- Mathematics, EconomicsInternational Journal of Modern Physics D
- 2020

We study [Formula: see text]-attractor models with both E-model and T-model potential in an extended Nonminimal Derivative (NMD) inflation where a canonical scalar field and its derivatives are…

Constraints on α -attractor inflation and reheating

- Physics
- 2016

We investigate a constraint on reheating followed by �-attractor-type inflation (the E-model and T-model) from an observation of the spectral index ns. When the energy density of the universe is…

Non-minimal Inflationary Attractors

- Mathematics
- 2013

Recently we identified a new class of (super)conformally invariant theories which allow inflation even if the scalar potential is very steep in terms of the original conformal variables.…