# Effective horizons, junction conditions and large-scale magnetism

@article{Giovannini2017EffectiveHJ, title={Effective horizons, junction conditions and large-scale magnetism}, author={Massimo Giovannini}, journal={The European Physical Journal C}, year={2017}, volume={77}, pages={1-7} }

The quantum mechanical generation of hypermagnetic and hyperlectric fields in four-dimensional conformally flat background geometries rests on the simultaneous continuity of the effective horizon and of the extrinsic curvature across the inflationary boundary. The junction conditions for the gauge fields are derived in general terms and corroborated by explicit examples with particular attention to the limit of a sudden (but nonetheless continuous) transition of the effective horizon. After…

## One Citation

Primordial magnetic fields from gravitationally coupled electrodynamics in nonsingular bounce cosmology

- PhysicsScience China Physics, Mechanics & Astronomy
- 2018

We in this paper study a class of mechanism of the production of the primordial magnetic field (PMF) in the non-singular bouncing cosmology, through the coupling of the electromagnetic field to…

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