1999/01/14 by Orfeu Bertolami, O. Bertolami, David F. Mota +3
Physics and Astronomy · #Astrophysics (astro-ph) #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph) #Noncommutative and Quantum Gravity Theories #astro-ph #gr-qc #hep-ph
paper · pdf · doi:10.48550/arxiv.gr-qc/9901041
6 pages, plain Latex (requires mprocl.sty file available at http://www.indiana.edu/~cpt98/proceedings.html). Talk delivered by O.B. at the Meeting on CPT and Lorentz Symmetry, Bloomington, USA, November 1998
arxiv created 1999/01/14 · openalex publication_date 1999/01/14 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Spontaneous breaking of Lorentz invariance may take place in string theories, possibly endowing the photon with a mass. This leads to the breaking of the conformal symmetry of the electromagnetic action allowing for the generation within inflationary scenarios of magnetic fields over Mpc scales. We show that the generated fields are consistent with amplification by the galactic dynamo processes and can be as large as to explain the observed galactic magnetic fields through the collapse of protogalactic clouds.