Primordial Magnetic Fields From String Cosmology

Abstract

Sufficiently large seeds for generating the observed (inter)galactic magnetic fields emerge naturally in string cosmology from the amplification of electromagnetic vacuum fluctuations due to a dynamical dilaton background. The success of the mechanism depends crucially on two features of the so-called pre-big-bang scenario, an early epoch of dilaton-driven inflation at very small coupling, and a sufficiently long intermediate stringy era preceding the standard radiation-dominated evolution.

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References in corpus (6)

• The Graceful Exit Problem in String Cosmology
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• Dilaton Production in String Cosmology
• Metric Perturbations in Dilaton-Driven Inflation
• Constraints on the Strength of a Primordial Magnetic Field from Big Bang Nucleosynthesis
• Limits on possible magnetic fields at nucleosynthesis time

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