Varying Electromagnetic Coupling and Primordial Magnetic Fields

Abstract

We study the effect of variations of the electromagnetic coupling on the process of generation of primordial magnetic fields. We find that only through a significant growth of the electromagnetic coupling minimum seed fields can be produced. We also show that, if through some process in the early Universe the photon acquires a mass that leads, thanks to inflation, to the generation of primordial magnetic fields, then the influence of variations of the electromagnetic coupling amounts essentially to the results due to the photon effective mass alone.

Revtex4, 7 pages, 1 figure

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Cited by in corpus (20)

• Primordial magnetogenesis
• Large-scale magnetic fields in the inflationary universe
• Magnetic field generation from cosmological perturbations
• Vector Curvaton with varying Kinetic Function
• Particle Production of Vector Fields: Scale Invariance is Attractive
• Generic estimates for magnetic fields generated during inflation including Dirac-Born-Infeld theories
• Parity Violating Statistical Anisotropy
• Inflation from Charged Scalar and Primordial Magnetic Fields?
• Large-scale magnetic fields from inflation due to Chern-Simons-like effective interaction
• The interrelation between the generation of large-scale electric fields and that of large-scale magnetic fields during inflation
• Constraints on Gauge Field Production during Inflation
• Property of the spectrum of large-scale magnetic fields from inflation
• Statistical Anisotropy and the Vector Curvaton Paradigm
• Constraints on supernovae dimming from photon-pseudo scalar coupling
• Magnetogenesis and the primordial non-gaussianity
• Large-scale magnetic fields from inflation due to a $CPT$-even Chern-Simons-like term with Kalb-Ramond and scalar fields
• Correlated curvature perturbations and magnetogenesis from the GUT gauge bosons
• The variation of the electromagnetic coupling and quintessence
• The electromagnetic coupling and the dark side of the Universe
• Primordial magnetic fields in theories of gravity with non-minimal coupling between curvature and matter