Skip to main content
We gratefully acknowledge support from the Simons Foundation, member institutions, and all contributors. Donate
arXiv logo
Cornell University Logo

High Energy Physics - Theory

arXiv:1807.01329 (hep-th)
[Submitted on 3 Jul 2018]

Title:Dirac Born-Infeld inflation under constant roll conditions

Authors:Sayantani Lahiri
View PDF
Abstract:In the present paper, we aim to generalize the constant-roll inflation in the non-canonical set-up, particularly in the context of scalar Dirac-Born-Infeld (DBI) theory which has emerged to be prospective candidate for describing inflation in the realm of string theory and in general permits time dependent speed of sound. Assuming the simplest case, when the speed of sound of scalar fluctuations is constant but different from unity, we obtain exact inflationary solutions and corresponding solutions of warp factors under constant-roll conditions. In this scenario, the inflationary solution is found to be an attractor. The power spectra of curvature fluctuations is analysed in the DBI regime and finally an estimation for predicting the observational bound on the DBI constant roll parameter is performed by using the the values of scalar spectral index and speed of sound provided by Planck and WMAP data.
Comments: 24 pages, 18 figures
Subjects: High Energy Physics - Theory (hep-th)
Cite as: arXiv:1807.01329 [hep-th]
  (or arXiv:1807.01329v1 [hep-th] for this version)
  https://doi.org/10.48550/arXiv.1807.01329

Submission history

From: Sayantani Lahiri [view email]
[v1] Tue, 3 Jul 2018 18:04:06 UTC (323 KB)
Full-text links:

Access Paper:

view license
Current browse context:
hep-th
< prev   |   next >
new | recent | 2018-07

References & Citations

export BibTeX citation

Bookmark

BibSonomy logo Reddit logo

Bibliographic and Citation Tools

Bibliographic Explorer (What is the Explorer?)
Connected Papers (What is Connected Papers?)
Litmaps (What is Litmaps?)
scite Smart Citations (What are Smart Citations?)

Code, Data and Media Associated with this Article

alphaXiv (What is alphaXiv?)
CatalyzeX Code Finder for Papers (What is CatalyzeX?)
DagsHub (What is DagsHub?)
Gotit.pub (What is GotitPub?)
Hugging Face (What is Huggingface?)
Papers with Code (What is Papers with Code?)
ScienceCast (What is ScienceCast?)

Demos

Replicate (What is Replicate?)
Hugging Face Spaces (What is Spaces?)
TXYZ.AI (What is TXYZ.AI?)

Recommenders and Search Tools

Influence Flower (What are Influence Flowers?)
CORE Recommender (What is CORE?)
IArxiv Recommender (What is IArxiv?)

arXivLabs: experimental projects with community collaborators

arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website.

Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them.

Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs.

Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)