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Large-scale magnetic fields in the inflationary universe

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arxiv astro-ph/0611701 v1 pith:33BEJQF3 submitted 2006-11-22 astro-ph hep-phhep-th

Large-scale magnetic fields in the inflationary universe

classification astro-ph hep-phhep-th
keywords fieldsmagneticlarge-scaleformulageneralgenerationinflationaryamplitude
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The generation of large-scale magnetic fields is studied in inflationary cosmology. We consider the violation of the conformal invariance of the Maxwell field by dilatonic as well as non-minimal gravitational couplings. We derive a general formula for the spectrum of large-scale magnetic fields for a general form of the coupling term and the formula for the spectral index. The result tells us clearly the (necessary) condition for the generation of magnetic fields with sufficiently large amplitude.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Chiral gravitational waves from multi-phase magnetogenesis

    astro-ph.CO 2026-02 unverdicted novelty 6.0

    Multi-phase inflation with chiral vector interactions generates amplified primordial magnetic fields that induce a detectable circularly polarized gravitational-wave background.

  2. Inflationary trispectrum of gauge fields from scalar and tensor exchanges

    hep-th 2025-09 conditional novelty 6.0

    The inflationary trispectrum of gauge fields from scalar and tensor exchanges is derived analytically, yielding beta^zeta_nl = (b^zeta_nl)^2 in the counter-collinear limit and growing flattened-limit signals.