Primordial Magnetic Fields From String Cosmology

Details Primordial Magnetic Fields From String Cosmology Primordial Magnetic Fields From String Cosmology

1995-04-17

arxiv.org/abs/hep-th/9504083v1

Phys.Rev.Lett. 75 (1995) 3796-3799

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, latex, two figures available by fax upon request

Scientific paper

10.1103/PhysRevLett.75.3796

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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