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Electric-magnetic duality and the conditions of inflationary magnetogenesis

The magnetogenesis scenarios triggered by the early variation of the gauge coupling are critically analyzed. In the absence of sources, it is shown that the electric and magnetic power spectra can be explicitly computed by means of electric-magnetic duality transformations. The remnants of a pre-inf...

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Detalles Bibliográficos
Autor principal: Giovannini, Massimo
Lenguaje:eng
Publicado: 2009
Materias:
Acceso en línea:https://dx.doi.org/10.1088/1475-7516/2010/04/003
http://cds.cern.ch/record/1217354
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author Giovannini, Massimo
author_facet Giovannini, Massimo
author_sort Giovannini, Massimo
collection CERN
description The magnetogenesis scenarios triggered by the early variation of the gauge coupling are critically analyzed. In the absence of sources, it is shown that the electric and magnetic power spectra can be explicitly computed by means of electric-magnetic duality transformations. The remnants of a pre-inflationary expansion and the reheating process break explicitly electric-magnetic duality by inducing Ohmic currents. The generation of large-scale magnetic field and the physical distinction between electric and magnetic observables stems, in this class of models, from the final value reached by the conductivity of the plasma right after inflation. Specific numerical examples are given. The physical requirements of viable magnetogenesis scenarios are spelled out.
id cern-1217354
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2009
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spelling cern-12173542019-09-30T06:29:59Zdoi:10.1088/1475-7516/2010/04/003http://cds.cern.ch/record/1217354engGiovannini, MassimoElectric-magnetic duality and the conditions of inflationary magnetogenesisAstrophysics and AstronomyThe magnetogenesis scenarios triggered by the early variation of the gauge coupling are critically analyzed. In the absence of sources, it is shown that the electric and magnetic power spectra can be explicitly computed by means of electric-magnetic duality transformations. The remnants of a pre-inflationary expansion and the reheating process break explicitly electric-magnetic duality by inducing Ohmic currents. The generation of large-scale magnetic field and the physical distinction between electric and magnetic observables stems, in this class of models, from the final value reached by the conductivity of the plasma right after inflation. Specific numerical examples are given. The physical requirements of viable magnetogenesis scenarios are spelled out.arXiv:0911.0896CERN-PH-TH-2009-213oai:cds.cern.ch:12173542009-11-05
spellingShingle Astrophysics and Astronomy
Giovannini, Massimo
Electric-magnetic duality and the conditions of inflationary magnetogenesis
title Electric-magnetic duality and the conditions of inflationary magnetogenesis
title_full Electric-magnetic duality and the conditions of inflationary magnetogenesis
title_fullStr Electric-magnetic duality and the conditions of inflationary magnetogenesis
title_full_unstemmed Electric-magnetic duality and the conditions of inflationary magnetogenesis
title_short Electric-magnetic duality and the conditions of inflationary magnetogenesis
title_sort electric-magnetic duality and the conditions of inflationary magnetogenesis
topic Astrophysics and Astronomy
url https://dx.doi.org/10.1088/1475-7516/2010/04/003
http://cds.cern.ch/record/1217354
work_keys_str_mv AT giovanninimassimo electricmagneticdualityandtheconditionsofinflationarymagnetogenesis