Anisotropic power-law inflation for a model of two scalar and two vector fields
Inspired by an interesting counterexample to the cosmic no-hair conjecture found in a supergravity-motivated model recently, we propose a multi-field extension, in which two scalar fields are allowed to non-minimally couple to two vector fields, respectively. This model is shown to admit an exact Bi...
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| Ngôn ngữ: | eng |
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The European Physical Journal C
2021
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| Truy cập trực tuyến: | https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-021-09334-y https://dlib.phenikaa-uni.edu.vn/handle/PNK/2821 https://doi.org/10.1140/epjc/s10052-021-09334-y |
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oai:localhost:PNK-28212022-08-17T05:54:49Z Anisotropic power-law inflation for a model of two scalar and two vector fields Tuan Q. Do W. F. Kao Inspired by an interesting counterexample to the cosmic no-hair conjecture found in a supergravity-motivated model recently, we propose a multi-field extension, in which two scalar fields are allowed to non-minimally couple to two vector fields, respectively. This model is shown to admit an exact Bianchi type I power-law solution. Furthermore, stability analysis based on the dynamical system method is performed to show that this anisotropic solution is indeed stable and attractive if both scalar fields are canonical. Nevertheless, if one of the two scalar fields is phantom then the corresponding anisotropic power-law inflation turns unstable as expected. 2021-09-13T04:24:47Z 2021-09-13T04:24:47Z 2021 Bài trích https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-021-09334-y https://dlib.phenikaa-uni.edu.vn/handle/PNK/2821 https://doi.org/10.1140/epjc/s10052-021-09334-y eng application/pdf The European Physical Journal C |
| institution |
Digital Phenikaa |
| collection |
Digital Phenikaa |
| language |
eng |
| description |
Inspired by an interesting counterexample to the cosmic no-hair conjecture found in a supergravity-motivated model recently, we propose a multi-field extension, in which two scalar fields are allowed to non-minimally couple to two vector fields, respectively. This model is shown to admit an exact Bianchi type I power-law solution. Furthermore, stability analysis based on the dynamical system method is performed to show that this anisotropic solution is indeed stable and attractive if both scalar fields are canonical. Nevertheless, if one of the two scalar fields is phantom then the corresponding anisotropic power-law inflation turns unstable as expected. |
| format |
Bài trích |
| author |
Tuan Q. Do W. F. Kao |
| spellingShingle |
Tuan Q. Do W. F. Kao Anisotropic power-law inflation for a model of two scalar and two vector fields |
| author_facet |
Tuan Q. Do W. F. Kao |
| author_sort |
Tuan Q. Do |
| title |
Anisotropic power-law inflation for a model of two scalar and two vector fields |
| title_short |
Anisotropic power-law inflation for a model of two scalar and two vector fields |
| title_full |
Anisotropic power-law inflation for a model of two scalar and two vector fields |
| title_fullStr |
Anisotropic power-law inflation for a model of two scalar and two vector fields |
| title_full_unstemmed |
Anisotropic power-law inflation for a model of two scalar and two vector fields |
| title_sort |
anisotropic power-law inflation for a model of two scalar and two vector fields |
| publisher |
The European Physical Journal C |
| publishDate |
2021 |
| url |
https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-021-09334-y https://dlib.phenikaa-uni.edu.vn/handle/PNK/2821 https://doi.org/10.1140/epjc/s10052-021-09334-y |
| _version_ |
1751856264053260288 |
| score |
8.881002 |