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Anisotropic power-law inflation for a conformal-violating Maxwell model
A set of power-law solutions of a conformal-violating Maxwell model with a
non-standard scalar-vector coupling will be shown in this paper. In particular,
we are interested in a coupling term of the form
with denoting the kinetic term of the scalar field. Stability analysis
indicates that the new set of anisotropic power-law solutions is unstable
during the inflationary phase. The result is consistent with the cosmic no-hair
conjecture. We show, however, that a set of stable slowly expanding solutions
does exist for a small range of parameters and . Hence a small
anisotropy can survive during the slowly expanding phase.Comment: 13 pages with 3 figure
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