Anisotropic power-law inflation for a conformal-violating Maxwell model

Tuan Q. Do, Win-Fun Kao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

A set of power-law solutions of a conformal-violating Maxwell model with a non-standard scalar-vector coupling will be shown in this paper. In particular, we are interested in a coupling term of the form X 2 n F μ ν F μ ν with X denoting the kinetic term of the scalar field. Stability analysis indicates that the new set of anisotropic power-law solutions is unstable during the inflationary phase. The result is consistent with the cosmic no-hair conjecture. We show, however, that a set of stable slowly expanding solutions does exist for a small range of parameters λ and n. Hence a small anisotropy can survive during the slowly expanding phase.

Original languageEnglish
Article number360
JournalEuropean Physical Journal C
Volume78
Issue number5
DOIs
StatePublished - 1 May 2018

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