Stable cosmological solutions in degenerate theory of gravity

Ryotaro Kase, Rampei Kimura, Atsushi Naruko, Daisuke Yoshida

研究成果査読

5 被引用数 (Scopus)

抄録

We study cosmological applications of extended vector–tensor theories, whose Lagrangians contain up to two derivatives with respect to metric and vector field. We derive background equations under the assumption of homogeneous and isotropic universe and study the nature of cosmological perturbations on top of the background. We found an example of healthy cosmological solutions in non-trivial degenerate theory of gravity for the first time, where those perturbations do not suffer from any instabilities, that is, ghost and gradient instabilities.

本文言語English
ページ(範囲)320-325
ページ数6
ジャーナルPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
783
DOI
出版ステータスPublished - 2018 8 10
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

フィンガープリント

「Stable cosmological solutions in degenerate theory of gravity」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル