Universal Cosmologies
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arXiv
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866915403799724032 |
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| author | Marconnet, Paul Tsimpis, Dimitrios |
| author_facet | Marconnet, Paul Tsimpis, Dimitrios |
| contents | Universal cosmologies are exact solutions of 10d type IIA supergravity containing a 4d Friedmann-Lemaître-Robertson-Walker factor, that can also be repackaged as solutions of 4d models, i.e. as 4d consistent truncations. We extend the dynamical system analysis of universal cosmologies, beyond the case of a single exponential potential. For an open universe (negative 3d spatial curvature), these models generally possess many desirable features: parametric control of e-folds, late-time acceleration from potentials with steep exponentials (i.e. in accordance with swampland bounds), small string-loop and $α'$-corrections, scale separation and/or absence of decompactification. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2505_03449 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Universal Cosmologies Marconnet, Paul Tsimpis, Dimitrios High Energy Physics - Theory Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology Universal cosmologies are exact solutions of 10d type IIA supergravity containing a 4d Friedmann-Lemaître-Robertson-Walker factor, that can also be repackaged as solutions of 4d models, i.e. as 4d consistent truncations. We extend the dynamical system analysis of universal cosmologies, beyond the case of a single exponential potential. For an open universe (negative 3d spatial curvature), these models generally possess many desirable features: parametric control of e-folds, late-time acceleration from potentials with steep exponentials (i.e. in accordance with swampland bounds), small string-loop and $α'$-corrections, scale separation and/or absence of decompactification. |
| title | Universal Cosmologies |
| topic | High Energy Physics - Theory Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2505.03449 |