Anisotropic power-law inflation for a two scalar fields model

Details Anisotropic power-law inflation for a two scalar fields model Anisotropic power-law inflation for a two scalar fields model

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011phrvd..83l3002d&link_type=abstract

Physical Review D, vol. 83, Issue 12, id. 123002

Physics

5

Relativity And Gravitation, Modified Theories Of Gravity, Origin And Formation Of The Universe, Mathematical And Relativistic Aspects Of Cosmology

Scientific paper

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.

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