The dark energy properties of the Dirac-Born-Infeld action
type: Item
instance of: scholarly article
title: The dark energy properties of the Dirac-Born-Infeld action
zbMATH Open document ID: 1297.83065
published in: Entropy
publication date: 2014-09-08T00:00:00Z
review text: Summary: Introducing a new potential, we deduce a general Lagrangian for Dirac-Born-Infeld (DBI) inflation, in which the determinant of the induced metric naturally includes the kinetic energy and the potential energy. In particular, the potential energy and kinetic energy can convert into each other at any same order, which is in agreement with the limit of classical physics. We also present a general sound speed in the evolutions of the universe, and the exact expressions of energy-momentum tensor, pressure and density. Furthermore, from the results we obtain the new equation of states. The analytic form of the action that is consistent with data turns out to be surprisingly simple and easy to categorize. Finally, we examine properties of the dark energy and introduce a novel mechanism for realizing either quintessence or phantom dark energy dominated phases within a string theoretical context.
Mathematics Subject Classification ID: 83F05
Mathematics Subject Classification ID: 81T20
Mathematics Subject Classification ID: 85A40
Mathematics Subject Classification ID: 85A30
Mathematics Subject Classification ID: 83D05
Mathematics Subject Classification ID: 83C15
Mathematics Subject Classification ID: 83E30
zbMATH DE Number: 6341013
zbMATH Keywords: DBI Lagrangian
zbMATH Keywords: dark energy
zbMATH Keywords: sound speed
zbMATH Keywords: Dirac-Born-Infeld (DBI) inflation
zbMATH Keywords: quintessence
zbMATH Keywords: phantom dark energy
zbMATH Keywords: string
MaRDI profile type: Publication
full work available at URL: https://doi.org/10.3390/e14071203
OpenAlex ID: W2022004797
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DOI: 10.3390/E14071203
author: Xinyou Zhang
author: Qing Zhang
author: Yong-Chang Huang
description: scientific article; zbMATH DE number 6341013