Anisotropic power-law inflation for a two scalar fields model

Tuan Q. Do*, W. F. Kao, Ing Chen Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


A special class of Bianchi type I expanding solutions in a string motivated theory with a single scalar field has been speculated to break the cosmic no-hair theorem that will not approach the late time isotropic expanding solution. We will show by a new perturbation approach that an unstable mode for the inflationary solutions exists when an additional phantom field is introduced. The result indicates that the existence of an unstable mode is closely related to the extra fields that could be present during the very early Universe.

Original languageEnglish
Article number123002
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number12
StatePublished - 7 Jun 2011


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