Magnetogenesis in Matter - Ekpyrotic Bouncing Cosmology

In the recent past there have been many attempts to associate the generation of primordial magnetic seed fields with the inflationary era, but with limited success. We take a different approach, using the single scalar field model for nonsingular bouncing cosmology. A coupling of the electromagnetic Lagrangian $F_{\mu\nu}F^{\mu\nu}$ with a scalar field $\phi$ that drives the background evolution has been considered for the breaking of conformal invariance. We have shown that the non singular bouncing cosmology model supports magnetogenesis evading the long standing backreaction/strong coupling problems which have plagued inflationary magnetogenesis. The parameter range of the bouncing model that is compatible with observed CMB anisotropies gives rise to desired strength of magnetic fields. It is also important to note that no BKL instability arises within this parameter range. The energy scales chosen for different stages of evolution of the bouncing model solves the problem of Standard Big Bang cosmology as well as gives rise to right strength for magnetogenesis.