Anisotropic inflation with derivative couplings

Jonathan Holland, Sugumi Kanno, Ivonne Zavala

研究成果: Contribution to journalArticle査読

12 被引用数 (Scopus)

抄録

We study anisotropic power-law inflationary solutions when the inflaton and its derivative couple to a vector field. This type of coupling is motivated by D-brane inflationary models, in which the inflaton, and a vector field living on the D-brane, couple disformally (derivatively). We start by studying a phenomenological model where we show the existence of anisotropic solutions and demonstrate their stability via a dynamical system analysis. Compared to the case without a derivative coupling, the anisotropy is reduced and thus can be made consistent with current limits, while the value of the slow-roll parameter remains almost unchanged. We also discuss solutions for more general cases, including D-brane-like couplings.

本文言語英語
論文番号103534
ジャーナルPhysical Review D
97
10
DOI
出版ステータス出版済み - 5 15 2018
外部発表はい

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(その他)

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