2004/02/12 by C. S. Camara, C. S. Câmara, M. R. de Garcia Maia +3 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #De Sitter universe #Friedmann–Lemaître–Robertson–Walker metric #Initial singularity #Invertible matrix #Lambda #Magnetic field #Mathematical analysis #Mathematical physics #Nonlinear system #Physics #Quantum electrodynamics #Quantum mechanics #Singularity #Solar and Space Plasma Dynamics #Theoretical physics #Universe #astro-ph
paper · pdf · doi:10.1103/physrevd.69.123504
published as Phys.Rev. D69 (2004) 123504 · 20 pages, 7 figures
arxiv created 2004/02/12 · openalex publication_date 2004/06/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The possibility to avoid the cosmic initial singularity as a consequence of nonlinear effects on the Maxwell eletromagnetic theory is discussed. For a flat Friedmann-Robertson-Walker (FRW) geometry we derive the general nonsingular solution supported by a magnetic field plus a cosmic fluid and a nonvanishing vacuum energy density. The nonsingular behavior of solutions with a time-dependent \ensuremathΛ(t) term are also examined. As a general result, it is found that the functional dependence of \ensuremathΛ(t) can uniquely be determined only if the magnetic field remains constant. All these models are examples of bouncing universes which may exhibit an inflationary dynamics driven by the nonlinear corrections of the magnetic field.