2014/12/29 by L. C. García de Andrade, L C Garcia de Andrade, de Andrade, L C Garcia
Biochemistry, Genetics and Molecular Biology · Physics and Astronomy · #Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Gravitation Theories #FOS: Physical sciences #Geomagnetism and Paleomagnetism Studies #Solar and Space Plasma Dynamics #astro-ph.GA
paper · pdf · doi:10.48550/arxiv.1412.8248
dept of theoretical physics, uerj, rio de janeiro, RJ, Brasil
arxiv created 2014/12/29 · openalex publication_date 2014/12/29 · arxiv updated 2014/12/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Earlier Bassett et al [Phys Rev D 63 (2001) 023506] investigated the amplification of large scale magnetic fields during preheating and inflation in several different models. They argued that in the presence of conductivity resonance effect is weakened. From a dynamo equation in spacetimes endowed with torsion recently derived by Garcia de Andrade [Phys Lett B 711: 143 (2012)] it is shown that a in a universe with pure torsion in Minkowski spacetime the cosmological magnetic field is enhanced by ohmic or non-conductivity effect, which shows that the metric-torsion effects is worth while of being studied. In this paper we investigated the metric-torsion preheating perturbation, which leads to the seed cosmological magnetic field in the universe with torsion is of the order of Bseed∼10-37Gauss which is several orders of magnitude weaker than the decoupling value obtained from pure metric preheating of 10-15Gauss. Despite of the weakness of the magnetic field this seed field may seed the galactic dynamo.