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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2402.00055 |
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| _version_ | 1866914662221611008 |
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| author | Suratgar, K. Mohsenzadeh, M. Yusofi, E. Taghizadeh-Farahmand, F. |
| author_facet | Suratgar, K. Mohsenzadeh, M. Yusofi, E. Taghizadeh-Farahmand, F. |
| contents | In this paper, $F(ν)$ cosmology is proposed for the accelerating universe with asymptotic de Sitter expansion in terms of Hankel function index $ν$. To some extent, both the initial expansion during early inflation and the current accelerated expansion can be studied with a vacuum cosmic fluid i.e. $Λ$ in the pure de Sitter phase. Observational data further support the notion of a quasi-vacuum fluid, rather than a pure vacuum, contributing to the quasi-de Sitter acceleration in both the early and late universe. By examining the asymptotic expansion of the Henkel function as an approximate solution of the Mukhanov-Sasaki equation, we seek a more detailed study of quasi-de Sitter solutions in cosmology containing vacuum-like fluid. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_00055 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Accelerating Universe in Terms of Hankel Function Index Suratgar, K. Mohsenzadeh, M. Yusofi, E. Taghizadeh-Farahmand, F. General Relativity and Quantum Cosmology In this paper, $F(ν)$ cosmology is proposed for the accelerating universe with asymptotic de Sitter expansion in terms of Hankel function index $ν$. To some extent, both the initial expansion during early inflation and the current accelerated expansion can be studied with a vacuum cosmic fluid i.e. $Λ$ in the pure de Sitter phase. Observational data further support the notion of a quasi-vacuum fluid, rather than a pure vacuum, contributing to the quasi-de Sitter acceleration in both the early and late universe. By examining the asymptotic expansion of the Henkel function as an approximate solution of the Mukhanov-Sasaki equation, we seek a more detailed study of quasi-de Sitter solutions in cosmology containing vacuum-like fluid. |
| title | Accelerating Universe in Terms of Hankel Function Index |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2402.00055 |