Cyclic Magnetic Universe

Abstract

Recent works have shown the important role Nonlinear Electrodynamics (NLED) can have in two crucial questions of Cosmology, concerning particular moments of its evolution for very large and for low-curvature regimes, that is for very condensed phase and at the present period of acceleration. We present here a toy model of a complete cosmological scenario in which the main factor responsible for the geometry is a nonlinear magnetic field which produces a FRW homogeneous and isotropic geometry. In this scenario we distinguish four distinct phases: a bouncing period, a radiation era, an acceleration era and a re-bouncing. It has already been shown that in NLED a strong magnetic field can overcome the inevitability of a singular region typical of linear Maxwell theory; on the other extreme situation, that is for very weak magnetic field it can accelerate the expansion. The present model goes one step further: after the acceleration phase the universe re-bounces and enter in a collapse era. This behavior is a manifestation of the invariance under the dual map of the scale factor $a(t)\to 1/a(t),$ a consequence of the corresponding inverse symmetry of the electromagnetic field ($F\to 1/F,$ where $F\equiv F^{\mu \nu }{F}_{\mu \nu }$) of the NLED theory presented here. Such sequence collapse-bouncing-expansion-acceleration-re-bouncing-collapse constitutes a basic unitary element for the structure of the universe that can be repeated indefinitely yielding what we call a Cyclic Magnetic Universe.

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Cited by in corpus (12)

• A Critical Review of Classical Bouncing Cosmologies
• de Broglie-Proca and Bopp-Podolsky massive photon gases in cosmology
• Exact black hole solutions with non-linear electrodynamic field
• Realistic Cyclic Magnetic Universe
• Holographic insulator/superconductor transition with exponential nonlinear electrodynamics probed by entanglement entropy
• Parameter estimation of a nonlinear magnetic universe from observations
• Magnetic fields and the Weyl tensor in the early universe
• Extended phase space thermodynamics of black hole with non-linear electrodynamic field
• Non-linear effects on radiation propagation around a charged compact object
• Probing the interference between non-linear, axionic and space-time-anisotropy effects in the QED vacuum
• Qualitative analysis of a quasi-magnetic universe
• New dynamical features of pure k-essential cosmologies