Onset of dark energy from cosmological scalarization and gravitational wave speed
Fuente:
arXiv
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| Autor principal: | |
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| Formato: | Preprint |
| Publicado: |
2023
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866915417054773248 |
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| author | Sadjadi, H. Mohseni |
| author_facet | Sadjadi, H. Mohseni |
| contents | This study investigates the emergence of dark energy during the matter-dominated era through spontaneous cosmological scalarization
in the scalar-Ricci-Gauss-Bonnet model.Our model aligns with the conjecture that the speed of gravitational waves at low
redshifts is nearly equal to the speed of light, implying that the Gauss-Bonnet invariant does not directly contribute to late-time
acceleration and suggesting that scalarization begins in the radiation-dominated era. The Gauss-Bonnet coupling stabilizes the quintessence
field at an initial fixed point with negligible dark energy density during the radiation era. As the Universe expands, the Ricci coupling induces a tachyonic transition in the quintessence field, driving the evolution of dark energy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_03697 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Onset of dark energy from cosmological scalarization and gravitational wave speed Sadjadi, H. Mohseni General Relativity and Quantum Cosmology High Energy Physics - Theory This study investigates the emergence of dark energy during the matter-dominated era through spontaneous cosmological scalarization in the scalar-Ricci-Gauss-Bonnet model.Our model aligns with the conjecture that the speed of gravitational waves at low redshifts is nearly equal to the speed of light, implying that the Gauss-Bonnet invariant does not directly contribute to late-time acceleration and suggesting that scalarization begins in the radiation-dominated era. The Gauss-Bonnet coupling stabilizes the quintessence field at an initial fixed point with negligible dark energy density during the radiation era. As the Universe expands, the Ricci coupling induces a tachyonic transition in the quintessence field, driving the evolution of dark energy. |
| title | Onset of dark energy from cosmological scalarization and gravitational wave speed |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2310.03697 |