Dynamic Dark Energy from the Local Limit of Nonlocal Gravity
Fuente:
arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866916134613155840 |
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| author | Tabatabaei, Javad Banihashemi, Abdolali Baghram, Shant Mashhoon, Bahram |
| author_facet | Tabatabaei, Javad Banihashemi, Abdolali Baghram, Shant Mashhoon, Bahram |
| contents | Nonlocal gravity (NLG), a classical extension of Einstein's theory of gravitation, has been studied mainly in linearized form. In particular, nonlinearities have thus far prevented the treatment of cosmological models in NLG. In this essay, we discuss the local limit of NLG and apply this limit to the expanding homogenous and isotropic universe. The theory only allows spatially flat cosmological models; furthermore, de Sitter spacetime is forbidden. The components of the model will have different dynamics with respect to cosmic time as compared to the standard $Λ$CDM model; specifically, instead of the cosmological constant, the modified flat model of cosmology involves a dynamic dark energy component in order to account for the accelerated phase of the expansion of the universe. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2305_07630 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Dynamic Dark Energy from the Local Limit of Nonlocal Gravity Tabatabaei, Javad Banihashemi, Abdolali Baghram, Shant Mashhoon, Bahram General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics Nonlocal gravity (NLG), a classical extension of Einstein's theory of gravitation, has been studied mainly in linearized form. In particular, nonlinearities have thus far prevented the treatment of cosmological models in NLG. In this essay, we discuss the local limit of NLG and apply this limit to the expanding homogenous and isotropic universe. The theory only allows spatially flat cosmological models; furthermore, de Sitter spacetime is forbidden. The components of the model will have different dynamics with respect to cosmic time as compared to the standard $Λ$CDM model; specifically, instead of the cosmological constant, the modified flat model of cosmology involves a dynamic dark energy component in order to account for the accelerated phase of the expansion of the universe. |
| title | Dynamic Dark Energy from the Local Limit of Nonlocal Gravity |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2305.07630 |