Anisotropic hyperbolic inflation for a model of two scalar and two vector fields
In this paper, we extend a recent proposed model of two scalar and two vector fields to a hyperbolic inflation scenario, in which the field space of two scalar fields is a hyperbolic space instead of a flat space. In this model, one of the scalar fields is assumed to be a radial field, while the oth...
Lưu vào:
| Tác giả chính: | , |
|---|---|
| Định dạng: | Bài trích |
| Ngôn ngữ: | English |
| Nhà xuất bản: |
Springer
2022
|
| Chủ đề: | |
| Truy cập trực tuyến: | https://link.springer.com/article/10.1140/epjc/s10052-022-10078-6 https://dlib.phenikaa-uni.edu.vn/handle/PNK/5946 https://doi.org/10.1140/epjc/s10052-022-10078-6 |
| Từ khóa: |
Thêm từ khóa
Không có từ khóa, Hãy là người đầu tiên đánh dấu biểu ghi này!
|
| Tóm tắt: | In this paper, we extend a recent proposed model of two scalar and two vector fields to a hyperbolic inflation scenario, in which the field space of two scalar fields is a hyperbolic space instead of a flat space. In this model, one of the scalar fields is assumed to be a radial field, while the other is set as an angular field. Furthermore, both scalar fields will be coupled to two different vector fields, respectively. As a result, we are able to obtain a set of exact Bianchi type I solutions to this model. Stability analysis is also performed to show that this set of anisotropic solutions is indeed stable and attractive during the inflationary phase. This result indicates that the cosmic no-hair conjecture is extensively violated in this anisotropic hyperbolic inflation model |
|---|