Cosmological evolution of Einstein-Aether models with power-law-like potential

Hao Wei*, Xiao Peng Yan, Ya Nan Zhou

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The so-called Einstein-Aether theory is General Relativity coupled (at second derivative order) to a dynamical unit time-like vector field (the aether). It is a Lorentz-violating theory, and gained much attention in the recent years. In the present work, we study the cosmological evolution of Einstein-Aether models with power-law-like potential, by using the method of dynamical system. In the case without matter, there are two attractors which correspond to an inflationary universe in the early epoch, or a de Sitter universe in the late time. In the case with matter but there is no interaction between dark energy and matter, there are only two de Sitter attractors, and no scaling attractor exists. So, it is difficult to alleviate the cosmological coincidence problem. Therefore, we then allow the interaction between dark energy and matter. In this case, several scaling attractors can exist under some complicated conditions, and hence the cosmological coincidence problem could be alleviated.

Original languageEnglish
Article number1719
Pages (from-to)1-19
Number of pages19
JournalGeneral Relativity and Gravitation
Volume46
Issue number5
DOIs
Publication statusPublished - May 2014

Keywords

  • Cosmological evolution
  • Dark energy
  • Dynamical system
  • Modified gravity

Fingerprint

Dive into the research topics of 'Cosmological evolution of Einstein-Aether models with power-law-like potential'. Together they form a unique fingerprint.

Cite this