https://doi.org/10.1140/epjc/s10052-018-5846-5
Regular Article - Theoretical Physics
Anisotropic power-law inflation for a conformal-violating Maxwell model
1
Faculty of Physics, VNU University of Science, Vietnam National University, Hanoi, 120000, Vietnam
2
Institute of Physics, Chiao Tung University, Hsin Chu, 30010, Taiwan
* e-mail: gore@mail.nctu.edu.tw
Received:
5
February
2018
Accepted:
25
April
2018
Published online:
8
May
2018
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 X 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 n. Hence a small anisotropy can survive during the slowly expanding phase.
© The Author(s), 2018
