Stability analysis of (an)isotropic inflation in Ricci-inverse gravity
We study a recent proposed Ricci-inverse gravity, which is a very novel type of fourth-order gravity. In particular, we are able to figure out both isotropically and anisotropically inflating universes to this model. More interestingly, these solutions are free from a singularity problem. However, s...
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| Tác giả chính: | |
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| Định dạng: | Bài Báo |
| Ngôn ngữ: | English |
| Nhà xuất bản: |
Conell University
2020
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| Chủ đề: | |
| Truy cập trực tuyến: | https://arxiv.org/abs/2009.06306 https://dlib.phenikaa-uni.edu.vn/handle/PNK/591 |
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| Tóm tắt: | We study a recent proposed Ricci-inverse gravity, which is a very novel type of fourth-order gravity. In particular, we are able to figure out both isotropically and anisotropically inflating universes to this model. More interestingly, these solutions are free from a singularity problem. However, stability analysis based on the dynamical system method shows that both isotropic and anisotropic inflation of this model turn out to be unstable against field perturbations. This result indicates that the Ricci-inverse gravity might not be compatible with the inflationary phase of the universe. |
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