PREPRINT
9D96A9A2-06FD-4C69-95C8-C97DBF622BFA

Primordial Magnetic Fields From String Cosmology

M. GasperinI, M. Giovannini, G. Veneziano
arXiv:hep-th/9504083

Submitted on 17 April 1995

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.

Preprint

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

Subjects: High Energy Physics - Theory; Astrophysics; General Relativity and Quantum Cosmology

URL: https://arxiv.org/abs/hep-th/9504083