Non-minimal coupling in large-field inflation models boosts primordial magnetic fields to present-day strengths of ~10^{-13} G while small-field models produce negligible amplitudes.
Evidence for gamma-ray halos around active galactic nuclei and the first measurement of intergalactic magnetic fields.The Astrophysical Journal Letters, 722(1):L39, 2010
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Inflationary magnetogenesis from non-minimal coupling in large- and small-field potentials
Non-minimal coupling in large-field inflation models boosts primordial magnetic fields to present-day strengths of ~10^{-13} G while small-field models produce negligible amplitudes.