Cosmological perturbations from five-dimensional inflation
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arXiv
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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866911856238526464 |
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| author | Antoniadis, Ignatios Cunat, Jules Guillen, Anthony |
| author_facet | Antoniadis, Ignatios Cunat, Jules Guillen, Anthony |
| contents | It was recently proposed that five-dimensional inflation can relate the causal size of the observable universe to the present weakness of gravitational interactions by blowing up an extra compact dimension from the microscopic fundamental length of gravity to a large size in the micron range, as required in the Dark Dimension proposal. Here, we compute the power spectrum of all primordial fluctuations emerging from a 5-dimensional inflaton in a slow-roll region of its potential, showing an interesting change of behaviour at large scales corresponding to angles larger than about 10 degrees in the sky. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2311_17680 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Cosmological perturbations from five-dimensional inflation Antoniadis, Ignatios Cunat, Jules Guillen, Anthony High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory It was recently proposed that five-dimensional inflation can relate the causal size of the observable universe to the present weakness of gravitational interactions by blowing up an extra compact dimension from the microscopic fundamental length of gravity to a large size in the micron range, as required in the Dark Dimension proposal. Here, we compute the power spectrum of all primordial fluctuations emerging from a 5-dimensional inflaton in a slow-roll region of its potential, showing an interesting change of behaviour at large scales corresponding to angles larger than about 10 degrees in the sky. |
| title | Cosmological perturbations from five-dimensional inflation |
| topic | High Energy Physics - Phenomenology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory |
| url | https://arxiv.org/abs/2311.17680 |