Primordial Magnetogenesis in a Bouncing Universe
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 RFμ Fμ , 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=6. It is also shown that the electromagnetic backreaction is not an issue in the model under scrutiny.
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