Primordial magnetogenesis in a bouncing model with dark energy
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Acceso en línea: | |
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| _version_ | 1866916468234387456 |
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| author | Bomfim, Marcus V. Frion, Emmanuel Pinto-Neto, Nelson Vitenti, Sandro D. P. |
| author_facet | Bomfim, Marcus V. Frion, Emmanuel Pinto-Neto, Nelson Vitenti, Sandro D. P. |
| contents | We investigate primordial magnetogenesis within a quantum bouncing model driven by a scalar field, focusing on various non-minimal couplings between the electromagnetic field and the scalar field. We test three cases: no coupling, a Cauchy coupling with gradual decay, and a Gaussian coupling with rapid fall-off. By exploring these scenarios, we assess a wide range of coupling strengths across different scales. The scalar field, with an exponential potential, behaves as pressureless matter in the asymptotic past of the contracting phase, as stiff matter around the bounce, and as dark energy during the expanding phase. Our findings reveal that, among the tested cases, only the Gaussian coupling can explain the generation of primordial magnetic fields on cosmological scales. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_05329 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Primordial magnetogenesis in a bouncing model with dark energy Bomfim, Marcus V. Frion, Emmanuel Pinto-Neto, Nelson Vitenti, Sandro D. P. General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics We investigate primordial magnetogenesis within a quantum bouncing model driven by a scalar field, focusing on various non-minimal couplings between the electromagnetic field and the scalar field. We test three cases: no coupling, a Cauchy coupling with gradual decay, and a Gaussian coupling with rapid fall-off. By exploring these scenarios, we assess a wide range of coupling strengths across different scales. The scalar field, with an exponential potential, behaves as pressureless matter in the asymptotic past of the contracting phase, as stiff matter around the bounce, and as dark energy during the expanding phase. Our findings reveal that, among the tested cases, only the Gaussian coupling can explain the generation of primordial magnetic fields on cosmological scales. |
| title | Primordial magnetogenesis in a bouncing model with dark energy |
| topic | General Relativity and Quantum Cosmology Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2409.05329 |