Friedmann equation and stability of inflationary higher derivative gravity

Win-Fun Kao*, Ue Li Pen, Pengjie Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

A stability analysis of the de Sitter universe in pure gravity theory is known to be useful in many aspects. We first show how to complete the proof of an earlier argument based on a redundant field equation. It is shown further that the stability condition applies to £0 Friedmann-Robertson-Walker spaces based on the nonredundant Friedmann equation derived from a simple effective Lagrangian. We show how to derive this expression for the Friedmann equation of pure gravity theory. This expression is also generalized to include scalar field interactions.

Original languageEnglish
Article number127301
JournalPhysical Review D
Volume63
Issue number12
DOIs
StatePublished - 1 Dec 2001

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