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| Main Authors: | , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2504.12406 |
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| _version_ | 1866916693558689792 |
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| author | Christodoulidis, Perseas Rosati, Robert Sfakianakis, Evangelos I. |
| author_facet | Christodoulidis, Perseas Rosati, Robert Sfakianakis, Evangelos I. |
| contents | Multi-field inflation can be inherently non-predictive, with the exception of models with strong attractors. In this work, we focus on models with multiple scalar fields that are non-minimally coupled to the space-time Ricci curvature scalar, motivated by the expectation of a rich particle spectrum at high energies. We show that in this family of models, the single- and multi-field predictions for CMB observables are identical, as long as there exists at least one non-minimal coupling with $ξ\gg 1$. We provide simple expressions for the Hubble scale, the number of $e$-folds, and the turn rate for systems with an arbitrary number of fields and explore the statistical properties for different priors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_12406 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Robust non-minimal attractors in many-field inflation Christodoulidis, Perseas Rosati, Robert Sfakianakis, Evangelos I. Cosmology and Nongalactic Astrophysics Multi-field inflation can be inherently non-predictive, with the exception of models with strong attractors. In this work, we focus on models with multiple scalar fields that are non-minimally coupled to the space-time Ricci curvature scalar, motivated by the expectation of a rich particle spectrum at high energies. We show that in this family of models, the single- and multi-field predictions for CMB observables are identical, as long as there exists at least one non-minimal coupling with $ξ\gg 1$. We provide simple expressions for the Hubble scale, the number of $e$-folds, and the turn rate for systems with an arbitrary number of fields and explore the statistical properties for different priors. |
| title | Robust non-minimal attractors in many-field inflation |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2504.12406 |