Anisotropic power-law inflation for a model of two scalar and two vector fields

Autor:	Tuan Q. Do, W. F. Kao
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	Astrophysics QB460-466 Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Zdroj:	European Physical Journal C: Particles and Fields, Vol 81, Iss 6, Pp 1-11 (2021)
Druh dokumentu:	article
ISSN:	1434-6044 1434-6052
DOI:	10.1140/epjc/s10052-021-09334-y
Popis:	Abstract Inspired by an interesting counterexample to the cosmic no-hair conjecture found in a supergravity-motivated model recently, we propose a multi-field extension, in which two scalar fields are allowed to non-minimally couple to two vector fields, respectively. This model is shown to admit an exact Bianchi type I power-law solution. Furthermore, stability analysis based on the dynamical system method is performed to show that this anisotropic solution is indeed stable and attractive if both scalar fields are canonical. Nevertheless, if one of the two scalar fields is phantom then the corresponding anisotropic power-law inflation turns unstable as expected.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/ba3bbdc5c0314d0994ee3548b7b7bf0b Zobrazit plný text záznamu View record in DOAJ Plný text ve formátu PDF Plný text ve formátu HTML
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