English

Primordial Magnetogenesis in a Bouncing Universe

General Relativity and Quantum Cosmology 2020-05-11 v2 Cosmology and Nongalactic Astrophysics High Energy Physics - Theory

Abstract

We investigate primordial magnetogenesis and the evolution of the electromagnetic field through a quantum bounce, in a model that starts in the far past from a contracting phase where only dust is present and the electromagnetic field is in the adiabatic quantum vacuum state. By including a coupling between curvature and electromagnetism of the form RFμνFμνRF_{\mu \nu}F^{\mu \nu}, we find acceptable magnetic field seeds within the current observational constraints at 1 mega-parsec (Mpc), and that the magnetic power spectrum evolves as a power-law with spectral index nB=6n_B=6. It is also shown that the electromagnetic backreaction is not an issue in the model under scrutiny.

Keywords

Cite

@article{arxiv.2004.07269,
  title  = {Primordial Magnetogenesis in a Bouncing Universe},
  author = {E. Frion and N. Pinto-Neto and S. D. P. Vitenti and S. E. Perez Bergliaffa},
  journal= {arXiv preprint arXiv:2004.07269},
  year   = {2020}
}

Comments

33 pages, 9 figures. Matches the published version in Physical Review D

R2 v1 2026-06-23T14:52:46.241Z