Scale Invariant Dark Energy
Fuente:
arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866912230808748032 |
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| author | Tronconi, Alessandro Venturi, Giovanni |
| author_facet | Tronconi, Alessandro Venturi, Giovanni |
| contents | A global scale-invariant Dark Energy model based on Induced Gravity with the addition of a small $R^2$ contribution is examined. The scalar field (quintessence), playing the role of Dark Energy, has a quartic potential and generates Newton's constant with its non-minimal coupling (after introducing a suitable symmetry breaking). Even when small, the $R^2$ contribution significantly modifies the cosmological evolution of the matter-gravity system. The solutions to this model are obtained analytically through a perturbative expansion and oscillate with transplanckian frequency. They are then compared with similar solutions found for $Λ$CDM cosmology plus $R^2$. Finally scalar field production is perturbatively taken into account in a simple model and the resulting effects illustrated. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_08334 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Scale Invariant Dark Energy Tronconi, Alessandro Venturi, Giovanni General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory A global scale-invariant Dark Energy model based on Induced Gravity with the addition of a small $R^2$ contribution is examined. The scalar field (quintessence), playing the role of Dark Energy, has a quartic potential and generates Newton's constant with its non-minimal coupling (after introducing a suitable symmetry breaking). Even when small, the $R^2$ contribution significantly modifies the cosmological evolution of the matter-gravity system. The solutions to this model are obtained analytically through a perturbative expansion and oscillate with transplanckian frequency. They are then compared with similar solutions found for $Λ$CDM cosmology plus $R^2$. Finally scalar field production is perturbatively taken into account in a simple model and the resulting effects illustrated. |
| title | Scale Invariant Dark Energy |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics High Energy Physics - Theory |
| url | https://arxiv.org/abs/2502.08334 |