Reconstruction of 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>α</mml:mi></mml:math>
-attractor supergravity models of inflation

Marco, Alessandro Di; Cabella, P.; Vittorio, N.

doi:10.1103/physrevd.95.023516

Cited by 8 publications

(12 citation statements)

References 112 publications

(172 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The α-attractor models [37,38,[40][41][42][43][44] arise in the context of supergravity [37,55,56,63], along with the attempt to build an inflationary mechanism (e.g., [39, 57? , 58]).…”

Section: Inflation Models and Modifications Of Gravitymentioning

confidence: 99%

“…String theory introduces modifications of Einstein gravity and brings along additional fields. We will use for our computations α´attractor models [37,38,[40][41][42][43][44] (see also [21,45] and [19,20]) which are a wide class of solutions of supergravity models. In this context there are two aspects which are relevant for the main results of this paper.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Supergravity, α-attractors and primordial non-Gaussianity

Bartolo

Bianco

Jiménez

et al. 2018

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

We compute in detail how deviations from Einstein gravity at the inflation energy scale could appear as non-Gaussian features in the sky. To illustrate this we use multi-field α´attractor models in the framework of supergravity to realise inflation. We find no obvious obstacle for having choices of model's parameters that generate non-Gaussian features of the equilateral and local type at the O(1) level in the f NL non-Gaussianity parameter, thus being potentially detectable in future cosmological surveys. This non-Gaussianity has its origin in either the non-canonical kinetic term (which, in turn, is an immediate consequence of assuming an hyperbolic geometry of the moduli space), the interactions of the fields in the potential or the α´parameter, or a combination of these three. This opens up the exciting possibility of constraining the law of gravity at energy scales close to the Planck one.

show abstract

“…The α-attractor models [37,38,[40][41][42][43][44] arise in the context of supergravity [37,55,56,63], along with the attempt to build an inflationary mechanism (e.g., [39, 57? , 58]).…”

Section: Inflation Models and Modifications Of Gravitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Supergravity, α-attractors and primordial non-Gaussianity

Bartolo

Bianco

Jiménez

et al. 2018

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

show abstract

“…The observables n s and r are the quantities useful to test the "degrees of compatibility" of a given model V (φ) with the cosmological data. As broadly discussed in [37,38], we can rewrite the observables in terms of the number of e-foldings N * , by using the relation…”

Section: Inflation and Quantum Fluctuationsmentioning

confidence: 99%

“…(10)), different values of the EoSp provide different pairs (n s , r). On the other hand, measurements of both n s and r allow to reconstruct a given model V (φ) (see [37] for details), and from it N reh and T reh using the equations Eq. (10) and Eq.(12).…”

Section: The End Of Inflation: the Reheating Phasementioning

confidence: 99%

See 1 more Smart Citation

Constraining the general reheating phase in the α -attractor inflationary cosmology

2017

Self Cite

View full text Add to dashboard Cite

In this paper we constrain some aspects of the general postinflationary phase in the context of superconformal α-attractor models of inflation. In particular, we provide constraints on the duration of the reheating process, N reh , and on the reheating temperature, T reh , simulating possible and future results given by the next-generation of cosmological missions. Moreover, we stress what kinds of equation-of-state parameter, w reh , are favored for different scenarios. The analysis does not depend on the details of the reheating phase and it is performed assuming different measurements of the tensor-to-scalar ratio r.

show abstract

Reconstruction of constant slow-roll inflation

Gao

2017

Sci. China Phys. Mech. Astron.

View full text Add to dashboard Cite

By using the relations between the slow-roll parameters and the power spectrum for the single field slow-roll inflation, we derive the scalar spectral tilt n s and the tensor to scalar ratio r for the constant slow-roll inflation and obtain the constraint on the slow-roll parameter η from the Planck 2015 results. The inflationary potential for the constant slow-roll inflation is then reconstructed in the framework of both general relativity and scalar-tensor theory of gravity, and compared with the recently reconstructed E model potential. In the strong coupling limit, we show that the η attractor is reached. *

show abstract

Reconstruction of α -attractor supergravity models of inflation

Cited by 8 publications

References 112 publications

Supergravity, α-attractors and primordial non-Gaussianity

Supergravity, α-attractors and primordial non-Gaussianity

Constraining the general reheating phase in the α -attractor inflationary cosmology

Reconstruction of constant slow-roll inflation

Contact Info

Product

Resources

About