Magnetic fields from second-order interactions

Bob Osano

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arXiv · 1403.5505

Magnetic fields from second-order interactions

Bob Osano

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Abstract

It is well known that when two types of perturbations interact in cosmological perturbation theory, the interaction may lead to the generation of a third type. In this article we discuss the generation of magnetic fields from such interactions. We determine conditions under which the interaction of a first-order magnetic field with a first-order scalar-or vector-, or tensor-perturbations would lead to the generation of second order magnetic field. The analysis is done in a covariant-index-free approach, but could be done in the standard covariant indexed-approach.

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Bob Osano. 2014-03-21. Magnetic fields from second-order interactions. https://arxiv.org/abs/1403.5505

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