Anisotropic inflation with non-abelian gauge kinetic function

Keiju Murata, Jiro Soda

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

We study an anisotropic inflation model with a gauge kinetic function for a non-abelian gauge field. We find that, in contrast to abelian models, the anisotropy can be either a prolate or an oblate type, which could lead to a different prediction from abelian models for the statistical anisotropy in the power spectrum of cosmological fluctuations. During a reheating phase, we find chaotic behaviour of the non-abelian gauge field which is caused by the nonlinear self-coupling of the gauge field. We compute a Lyapunov exponent of the chaos which turns out to be uncorrelated with the anisotropy.

Original languageEnglish
Article number037
JournalJournal of Cosmology and Astroparticle Physics
Volume2011
Issue number6
DOIs
Publication statusPublished - 2011 Jun
Externally publishedYes

Fingerprint

kinetics
anisotropy
chaos
power spectra
exponents
heating
predictions

Keywords

  • inflation
  • physics of the early universe

ASJC Scopus subject areas

  • Astronomy and Astrophysics

Cite this

Anisotropic inflation with non-abelian gauge kinetic function. / Murata, Keiju; Soda, Jiro.

In: Journal of Cosmology and Astroparticle Physics, Vol. 2011, No. 6, 037, 06.2011.

Research output: Contribution to journalArticle

@article{3d077b581164429aa8148ca2c00cf1e7,
title = "Anisotropic inflation with non-abelian gauge kinetic function",
abstract = "We study an anisotropic inflation model with a gauge kinetic function for a non-abelian gauge field. We find that, in contrast to abelian models, the anisotropy can be either a prolate or an oblate type, which could lead to a different prediction from abelian models for the statistical anisotropy in the power spectrum of cosmological fluctuations. During a reheating phase, we find chaotic behaviour of the non-abelian gauge field which is caused by the nonlinear self-coupling of the gauge field. We compute a Lyapunov exponent of the chaos which turns out to be uncorrelated with the anisotropy.",
keywords = "inflation, physics of the early universe",
author = "Keiju Murata and Jiro Soda",
year = "2011",
month = "6",
doi = "10.1088/1475-7516/2011/06/037",
language = "English",
volume = "2011",
journal = "Journal of Cosmology and Astroparticle Physics",
issn = "1475-7516",
publisher = "IOP Publishing Ltd.",
number = "6",

}

TY - JOUR

T1 - Anisotropic inflation with non-abelian gauge kinetic function

AU - Murata, Keiju

AU - Soda, Jiro

PY - 2011/6

Y1 - 2011/6

N2 - We study an anisotropic inflation model with a gauge kinetic function for a non-abelian gauge field. We find that, in contrast to abelian models, the anisotropy can be either a prolate or an oblate type, which could lead to a different prediction from abelian models for the statistical anisotropy in the power spectrum of cosmological fluctuations. During a reheating phase, we find chaotic behaviour of the non-abelian gauge field which is caused by the nonlinear self-coupling of the gauge field. We compute a Lyapunov exponent of the chaos which turns out to be uncorrelated with the anisotropy.

AB - We study an anisotropic inflation model with a gauge kinetic function for a non-abelian gauge field. We find that, in contrast to abelian models, the anisotropy can be either a prolate or an oblate type, which could lead to a different prediction from abelian models for the statistical anisotropy in the power spectrum of cosmological fluctuations. During a reheating phase, we find chaotic behaviour of the non-abelian gauge field which is caused by the nonlinear self-coupling of the gauge field. We compute a Lyapunov exponent of the chaos which turns out to be uncorrelated with the anisotropy.

KW - inflation

KW - physics of the early universe

UR - http://www.scopus.com/inward/record.url?scp=79959943473&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79959943473&partnerID=8YFLogxK

U2 - 10.1088/1475-7516/2011/06/037

DO - 10.1088/1475-7516/2011/06/037

M3 - Article

AN - SCOPUS:79959943473

VL - 2011

JO - Journal of Cosmology and Astroparticle Physics

JF - Journal of Cosmology and Astroparticle Physics

SN - 1475-7516

IS - 6

M1 - 037

ER -