@article{Kamarpour_Sobol_2018, title={Magnetogenesis in Natural Inflation Model}, volume={63}, url={https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018190}, DOI={10.15407/ujpe63.8.673}, abstractNote={<p>We study the process of inflationary magnetogenesis in the natural single-field inflation model, whose parameters are chosen in accordance with the recent observations by the Planck collaboration [1]. The conformal invariance of the Maxwell action is broken by a kinetic coupling with the inflaton field by means of the coupling function as a power of the scale factor, I(ф) ∝ aa, and a < 0 is used in order to avoid the strong coupling problem. For such a, the electric component of the energy density dominates over the magnetic one and, for a <- −2.2, it causes a strong back-reaction, which can spoil inflation and terminate the enhancement of the magnetic field. It is found that the magnetic fields generated without back-reaction problem cannot exceed ∼10−20G at the present epoch, and their spectrum has a blue tilt.</p>}, number={8}, journal={Ukrainian Journal of Physics}, author={Kamarpour, M. and Sobol, O.}, year={2018}, month={Sep.}, pages={673} }