Healthy Horndeski cosmologies with torsion
Fuente:
arXiv
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| Autori principali: | , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866917727486083072 |
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| author | Mironov, S. Valencia-Villegas, M. |
| author_facet | Mironov, S. Valencia-Villegas, M. |
| contents | We show that the full Horndeski theory with both curvature and torsion can support nonsingular, stable and subluminal cosmological solutions at all times. Thus, with torsion, the usual No-Go theorem that holds in a curved spacetime is avoided. In particular, it is essential to include the nonminimal derivative couplings of the $\mathcal{L}_{5}$ part of the Horndeski action ($G^{μν}\,\nabla_μ\nabla_νϕ,$ and $(\nabla^2 ϕ)^3$). Without the latter a No-Go already impedes the eternal subluminality of nonsingular, stable cosmologies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_08673 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Healthy Horndeski cosmologies with torsion Mironov, S. Valencia-Villegas, M. General Relativity and Quantum Cosmology High Energy Physics - Theory We show that the full Horndeski theory with both curvature and torsion can support nonsingular, stable and subluminal cosmological solutions at all times. Thus, with torsion, the usual No-Go theorem that holds in a curved spacetime is avoided. In particular, it is essential to include the nonminimal derivative couplings of the $\mathcal{L}_{5}$ part of the Horndeski action ($G^{μν}\,\nabla_μ\nabla_νϕ,$ and $(\nabla^2 ϕ)^3$). Without the latter a No-Go already impedes the eternal subluminality of nonsingular, stable cosmologies. |
| title | Healthy Horndeski cosmologies with torsion |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2405.08673 |