Anisotropic 2-form dark energy

Juan P. Beltrán Almeida, Alejandro Guarnizo, Ryotaro Kase, Shinji Tsujikawa*, César A. Valenzuela-Toledo

*この研究の対応する著者

研究成果: Article査読

12 被引用数 (Scopus)

抄録

We study the dynamics of dark energy in the presence of a 2-form field coupled to a canonical scalar field ϕ. We consider the coupling proportional to e −μϕ/M pl H αβγ H αβγ and the scalar potential V(ϕ)∝e −λϕ/M pl , where H αβγ is the 2-form field strength, μ,λ are constants, and M pl is the reduced Planck mass. We show the existence of an anisotropic matter-dominated scaling solution followed by a stable accelerated fixed point with a non-vanishing shear. Even if λ≥O(1), it is possible to realize the dark energy equation of state w DE close to −1 at low redshifts for μ≫λ. The existence of anisotropic hair and the oscillating behavior of w DE are key features for distinguishing our scenario from other dark energy models like quintessence.

本文言語English
ページ(範囲)396-404
ページ数9
ジャーナルPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
793
DOI
出版ステータスPublished - 2019 6月 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

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