Perturbations in Horndeski theory above anisotropic cosmological background
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arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2023
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| _version_ | 1866911813684166656 |
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| author | Mironov, S. Shtennikova, A. |
| author_facet | Mironov, S. Shtennikova, A. |
| contents | Considering an anisotropic cosmological background is an interesting and simultaneously challenging problem of theoretical physics, since we not only assume a high degree of anisotropy in the early stages of the Universe, but also observe it to a small degree until now. In this paper we have constructed the unconstrained action for the perturbations above Bianchi I type background in the most general scalar-tensor theory of gravity, the Horndeski theory, and evaluate the effect of the deviation from the anisotropic background on the previously established stable solution obtained in previous works. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_19171 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Perturbations in Horndeski theory above anisotropic cosmological background Mironov, S. Shtennikova, A. General Relativity and Quantum Cosmology High Energy Physics - Theory Considering an anisotropic cosmological background is an interesting and simultaneously challenging problem of theoretical physics, since we not only assume a high degree of anisotropy in the early stages of the Universe, but also observe it to a small degree until now. In this paper we have constructed the unconstrained action for the perturbations above Bianchi I type background in the most general scalar-tensor theory of gravity, the Horndeski theory, and evaluate the effect of the deviation from the anisotropic background on the previously established stable solution obtained in previous works. |
| title | Perturbations in Horndeski theory above anisotropic cosmological background |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2305.19171 |