A New Approach to the Analysis of Cosmological Parameters in Multifield Cosmology
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866913634619228160 |
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| author | Bolshakova, Katerina Chervon, Sergey |
| author_facet | Bolshakova, Katerina Chervon, Sergey |
| contents | Currently, a method has been developed for the cosmological inflation model with a single scalar field to calculate cosmological parameters such as the power spectrum of scalar and tensor perturbations, their spectral indices, and the tensor-to-scalar ratio. However, for a multifield configuration, a definitive method for calculating cosmological parameters has not yet been established.
We propose a new effective algorithm for determining cosmological parameters within the tensor-multi-scalar theory of gravity, which describes the early inflationary epoch of the Universe. Our approach is based on utilizing a specific analytical solution within a multifield cosmological model to establish functional relationships between fields. This method enables the computation of cosmological parameters and their comparison with observational data. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2501_01948 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A New Approach to the Analysis of Cosmological Parameters in Multifield Cosmology Bolshakova, Katerina Chervon, Sergey General Relativity and Quantum Cosmology Currently, a method has been developed for the cosmological inflation model with a single scalar field to calculate cosmological parameters such as the power spectrum of scalar and tensor perturbations, their spectral indices, and the tensor-to-scalar ratio. However, for a multifield configuration, a definitive method for calculating cosmological parameters has not yet been established. We propose a new effective algorithm for determining cosmological parameters within the tensor-multi-scalar theory of gravity, which describes the early inflationary epoch of the Universe. Our approach is based on utilizing a specific analytical solution within a multifield cosmological model to establish functional relationships between fields. This method enables the computation of cosmological parameters and their comparison with observational data. |
| title | A New Approach to the Analysis of Cosmological Parameters in Multifield Cosmology |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2501.01948 |