http://arxiv.org/abs/2304.08874
Cosmological implication of a generalized model of two scalar and two vector fields, in which both scalar fields are non-minimally coupled to each vector field, is studied in this paper. In particular, we will seek an anisotropic power-law inflationary solution to this model. Furthermore, the stability of the obtained solution will be examined by using the dynamical system approach. As a result, we will show that this solution turns out to be stable and attractive during the inflationary phase as expected due to the existence of the unusual couplings between two scalar and two vector fields. Remarkably, we will point out that the existence of phantom field will lead to an instability of the corresponding anisotropic power-law inflation.
T. Do and W. Kao
Wed, 19 Apr 23
51/58
Comments: 20 pages, 6 figures. Comments are welcome. arXiv admin note: text overlap with arXiv:2110.13516