2007/05/01 by A. Akhtari Zavareh, A. Akhtari-Zavareh, A. Hojjati +3 · 12 citations
Earth and Planetary Sciences · Physics and Astronomy · #Axion #Back-reaction #Classical mechanics #Cosmology and Gravitation Theories #Coupling (piping) #Curvature #Dilaton #Geophysics and Gravity Measurements #Inflation (cosmology) #Magnetic field #Particle physics #Physics #Quantum #Quantum electrodynamics #Quantum mechanics #Scalar (mathematics) #Scalar field #Solar and Space Plasma Dynamics #Theoretical physics #Universe #astro-ph
paper · pdf · doi:10.1143/ptp.117.803
published in Progress of Theoretical Physics 117(5), 803-822 (Oxford University Press) · 22 pages
openalex publication_date 2007/05/01 · arxiv created 2007/07/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We investigate the generation of large scale magnetic fields in the universe from quantum fluctuations produced in the inflationary stage. By coupling these quantum fluctuations to the dilaton field and Ricci scalar, we show that the magnetic fields with the strength observed today can be produced. We consider two situations: First, the evolution of dilaton ends at the onset of the reheating stage. Second, the dilaton continues its evolution after reheating and then decays. In both cases, we come back to the usual Maxwell equations after inflation and then calculate present magnetic fields.