Campanelli et al. (2009) [9] have recently shown that electromagnetic fluctuations in Lorentz violation
theories Colladay and Kostelecky (1998) [8] along differential rotation may induce galactic dynamo
amplification of magnetic fields from primordial seeds. In this Letter, instead of using the Maxwell–
Chern–Simmons–Lagrangian used in their paper, one adopts the Lagrangean of the type Rijkl F ij F kl,
where Rijkl represent the torsion modes, without dynamical curvature. This so-called Minkowski–Cartan
spacetime M4 torsion modes, allows us to handle QED vacuum in any Ricci scalar electrodynamics
Lagrangean. It is shown that axial-torsion modes electrodynamics allows us to obtain a slow decay of
magnetic fields. Thus primordial seed fields are amplified from differential rotation and protogalaxy
turbulence as galactic dynamo action. This is mainly due to the fact that the collapse of the protogalaxy
induces a strong suppression of the magnetic field decay. Magnetic field anisotropies are also considered.
To resume, photon-torsion axial coupling in the quantum electrodynamics (QED) framework in Riemann
flat contortioned spacetime may induce galactic dynamos. Fourier space transformation are used to
compute electrodynamic equations.