Large-scale magnetic fields from dilaton inflation in noncommutative spacetime

Details Large-scale magnetic fields from dilaton inflation in noncommutative spacetime Large-scale magnetic fields from dilaton inflation in noncommutative spacetime

2004-09-21

arxiv.org/abs/hep-ph/0409237v1

Phys.Rev. D70 (2004) 083508

Physics

High Energy Physics

High Energy Physics - Phenomenology

16 pages, no figure

Scientific paper

10.1103/PhysRevD.70.083508

The generation of large-scale magnetic fields is studied in dilaton electromagnetism in noncommutative inflationary cosmology taking into account the effects of the spacetime uncertainty principle motivated by string theory. We show that it is possible to generate large-scale magnetic fields with sufficient strength to account for the observed fields in galaxies and clusters of galaxies through only adiabatic compression without dynamo amplification mechanism in models of power-law inflation based on spacetime noncommutativity without introducing a huge hierarchy between the dilaton's potential and its coupling to the electromagnetic fields.

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