Constant-roll inflation with tachyon field in the holographic braneworld
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| Acceso en línea: | |
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| _version_ | 1866917775055781888 |
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| author | Stojanovic, Marko Bilic, Neven Dimitrijevic, Dragoljub D. Djordjevic, Goran S. Milosevic, Milan |
| author_facet | Stojanovic, Marko Bilic, Neven Dimitrijevic, Dragoljub D. Djordjevic, Goran S. Milosevic, Milan |
| contents | We study inflation driven by the tachyon field in the holographic braneworld by assuming the second slow-roll parameter $η$ is constant. The parameter $η$ can be either defined by the tachyon scalar field and the Hubble parameter or by the Hubble parameter only. By assuming a constant $η$, we derive and numerically solve a differential equation for the Hubble expansion rate. We calculate numerically the scalar spectral index and the tensor-to-scalar ratio. We confront the results with the observational data and find some constraints on the free model parameters. The swampland conjectures are discussed in the context of the constant-roll inflation, with some accent on the holographic model. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_00352 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Constant-roll inflation with tachyon field in the holographic braneworld Stojanovic, Marko Bilic, Neven Dimitrijevic, Dragoljub D. Djordjevic, Goran S. Milosevic, Milan General Relativity and Quantum Cosmology High Energy Physics - Theory We study inflation driven by the tachyon field in the holographic braneworld by assuming the second slow-roll parameter $η$ is constant. The parameter $η$ can be either defined by the tachyon scalar field and the Hubble parameter or by the Hubble parameter only. By assuming a constant $η$, we derive and numerically solve a differential equation for the Hubble expansion rate. We calculate numerically the scalar spectral index and the tensor-to-scalar ratio. We confront the results with the observational data and find some constraints on the free model parameters. The swampland conjectures are discussed in the context of the constant-roll inflation, with some accent on the holographic model. |
| title | Constant-roll inflation with tachyon field in the holographic braneworld |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2401.00352 |