Anisotropic power-law inflation in a two-scalar-field model with a mixed kinetic term
Abstract
We examine whether an extended scenario of a two-scalar-field model, in which a mixed kinetic term of canonical and phantom scalar fields is involved, admits the Bianchi type I metric, which is homogeneous but anisotropic spacetime, as its power-law solutions. Then we analyze the stability of the anisotropic power-law solutions to see whether these solutions respect the cosmic no-hair conjecture or not during the inflationary phase. In addition, we will also investigate a special scenario, where the pure kinetic terms of canonical and phantom fields disappear altogether in field equations, to test again the validity of cosmic no-hair conjecture. As a result, the cosmic no-hair conjecture always holds in both these scenarios due to the instability of the corresponding anisotropic inflationary solutions.
Keywords
Cite
@article{arxiv.1702.08308,
title = {Anisotropic power-law inflation in a two-scalar-field model with a mixed kinetic term},
author = {Tuan Q. Do and Sonnet Hung Q. Nguyen},
journal= {arXiv preprint arXiv:1702.08308},
year = {2017}
}
Comments
19 pages, no figures. Accepted for publication in International Journal of Modern Physics D