Magnetic fields from inflation?

Abstract

We consider the possibility of generation of the seeds of primordial magnetic field on inflation and show that the effect of the back reaction of this field can be very important. Assuming that back reaction does not spoil inflation we find a rather strong restriction on the amplitude of the primordial seeds which could be generated on inflation. Namely, this amplitude recalculated to the present epoch cannot exceed $10^{-32}G$ in $Mpc$ scales. This field seems to be too small to be amplified to the observable values by galactic dynamo mechanism.

10 pages

References in corpus (5)

• Strong magnetic fields in normal galaxies at high redshifts
• Instability of anisotropic cosmological solutions supported by vector fields
• A Global Probe of Cosmic Magnetic Fields to High Redshifts
• Large-scale magnetic fields in the inflationary universe
• Consistent Lorentz Violation in Flat and Curved Space