2016
DOI: 10.1103/physrevd.93.103511
|View full text |Cite
|
Sign up to set email alerts
|

Testing a two field inflation beyond the slow-roll approximation

Abstract: We consider a model of two-field inflation, containing an ordinary scalar field and a DBI field. We work beyond the slow-roll approximation, but we assume a separable Hubble parameter. We then derive the form of potential in this framework and study the spectrum of the primordial perturbations in details. We also study the amplitude of the non-Gaussianity of the primordial perturbations both in equilateral and orthogonal configurations in this setup. We test the model with recent observational data and find so… Show more

Help me understand this report
View preprint versions

Search citation statements

Order By: Relevance

Paper Sections

Select...
3
2

Citation Types

0
6
0

Year Published

2016
2016
2020
2020

Publication Types

Select...
4

Relationship

4
0

Authors

Journals

citations
Cited by 4 publications
(6 citation statements)
references
References 97 publications
0
6
0
Order By: Relevance
“…For these reasons, many authors studied the non-Gaussian feature of the primordial perturbations so far. For a relatively extended list of recent literature on non-Gaussianity, see [3,5,7,8,14,15,16,17,18,19,20,21,22,26,27,31,32,36,42,49,50,57,58,60,62,63,64,66,67,68,69,70,71,72,73,78,79,80,83,84,97].…”
Section: Introductionmentioning
confidence: 99%
“…For these reasons, many authors studied the non-Gaussian feature of the primordial perturbations so far. For a relatively extended list of recent literature on non-Gaussianity, see [3,5,7,8,14,15,16,17,18,19,20,21,22,26,27,31,32,36,42,49,50,57,58,60,62,63,64,66,67,68,69,70,71,72,73,78,79,80,83,84,97].…”
Section: Introductionmentioning
confidence: 99%
“…under the conditions 1 and |η| 1 show the inflation phase. In this extended setup, with GB correction, the slow-roll limits are asφ |3Hφ|,φ 2 V (φ), HĠ κ −2 and P ,X X κ −2 H 2 (see [34,77,98]).…”
Section: The General Gauss-bonnet Inflationmentioning
confidence: 99%
“…For more details about obtaining the equations presented in this section, see [12,76,77]. By having the required equations, in the next sections we explore the observational viability of some Gauss-Bonnet models.…”
Section: The General Gauss-bonnet Inflationmentioning
confidence: 99%
See 1 more Smart Citation
“…Also, in these models the perturbations are somewhat scale dependent and it is possible to have non-Gaussian distributed perturbations. We refer to [23,24,25,26] for some works on the issue of nonminimal derivatives in the early time accelerating expansion of the universe as well as the late time cosmic dynamics.…”
Section: Introductionmentioning
confidence: 99%