Accelerated expansion of the Universe in a higher dimensional modified gravity with Euler-Poincaré terms

Özgür Akarsu, Tekin Dereli, Neslihan Oflaz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

A higher dimensional modified gravity theory with an action that includes dimensionally continued Euler-Poincaré forms up to second order in curvatures is considered. The variational field equations are derived. Matter in the Universe at large scales is modeled by a fluid satisfying an equation of state with dimensional dichotomy. We study solutions that describe higher dimensional steady state cosmologies with constant volume for which the three dimensional external space is expanding at an accelerated rate while the (compact) internal space is contracting. We showed that the second order Euler-Poincaré term in the constructions of higher dimensional steady state cosmologies could be crucial.

Original languageEnglish
Article number215009
JournalClassical and Quantum Gravity
Volume32
Issue number21
DOIs
Publication statusPublished - 8 Oct 2015
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2015 IOP Publishing Ltd.

Keywords

  • KaluzaKlein cosmology
  • accelerated expansionof the Universe
  • modified gravity

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