تقرير
Inflation Driven by Non-Linear Electrodynamics
| العنوان: | Inflation Driven by Non-Linear Electrodynamics |
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| المؤلفون: | Benaoum, H. B., Leon, Genly, Ovgun, A., Quevedo, H. |
| المصدر: | Eur. Phys. J. C 83, 367 (2023) |
| سنة النشر: | 2022 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology High Energy Physics - Phenomenology High Energy Physics - Theory |
| مصطلحات موضوعية: | General Relativity and Quantum Cosmology, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology, High Energy Physics - Theory |
| الوصف: | We investigate the inflation driven by a nonlinear electromagnetic field based on an NLED lagrangian density ${\cal L}_{\text{nled}} = - {F} f \left( {F} \right)$, where $f \left( {F}\right)$ is a general function depending on ${F}$. We first formulate an $f$-NLED cosmological model with a more general function $f \left( {F}\right)$ and show that all NLED models can be expressed in this framework; then, we investigate in detail two interesting examples of the function $f \left( {F}\right)$. We present our phenomenological model based on a new Lagrangian for NLED. Solutions to the field equations with the physical properties of the cosmological parameters are obtained. We show that the early Universe had no Big-Bang singularity, which accelerated in the past. We also investigate the qualitative implications of NLED by studying the inflationary parameters, like the slow-roll parameters, spectral index $n_s$, and tensor-to-scalar ratio $r$, and compare our results with observational data. Detailed phase-space analysis of our NLED cosmological model is performed with and without matter source. As a first approach, we consider the motion of a particle of unit mass in an effective potential. Our systems correspond to fast-slow systems for physical values of the electromagnetic field and the energy densities at the end of inflation. We analyze a complementary system using Hubble-normalized variables to investigate the cosmological evolution before the matter-dominated Universe. Comment: 27 pages, 13 compound figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1140/epjc/s10052-023-11481-3 |
| URL الوصول: | http://arxiv.org/abs/2206.13157 |
| رقم الأكسشن: | edsarx.2206.13157 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1140/epjc/s10052-023-11481-3 |
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