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Primordial magnetic fields from metric perturbations
We study the amplification of electromagnetic vacuum fluctuations induced by the evolution of scalar metric perturbations at the end of inflation. Such perturbations break the conformal invariance of Maxwell equations in Friedmann-Robertson-Walker backgrounds and allow the growth of magnetic fields...
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| Lenguaje: | eng |
| Publicado: |
2000
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| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevD.64.083006 http://cds.cern.ch/record/455484 |
| _version_ | 1780896238572404736 |
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| author | Maroto, Antonio Lopez |
| author_facet | Maroto, Antonio Lopez |
| author_sort | Maroto, Antonio Lopez |
| collection | CERN |
| description | We study the amplification of electromagnetic vacuum fluctuations induced by the evolution of scalar metric perturbations at the end of inflation. Such perturbations break the conformal invariance of Maxwell equations in Friedmann-Robertson-Walker backgrounds and allow the growth of magnetic fields on super-Hubble scales. We estimate the strength of the fields generated by this mechanism on galactic scales and compare the results with the present bounds on the galactic dynamo seed fields. |
| id | cern-455484 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2000 |
| record_format | invenio |
| spelling | cern-4554842023-03-14T18:00:04Zdoi:10.1103/PhysRevD.64.083006http://cds.cern.ch/record/455484engMaroto, Antonio LopezPrimordial magnetic fields from metric perturbationsParticle Physics - PhenomenologyWe study the amplification of electromagnetic vacuum fluctuations induced by the evolution of scalar metric perturbations at the end of inflation. Such perturbations break the conformal invariance of Maxwell equations in Friedmann-Robertson-Walker backgrounds and allow the growth of magnetic fields on super-Hubble scales. We estimate the strength of the fields generated by this mechanism on galactic scales and compare the results with the present bounds on the galactic dynamo seed fields.We study the amplification of electromagnetic vacuum fluctuations induced by the evolution of scalar metric perturbations at the end of inflation. Such perturbations break the conformal invariance of Maxwell equations in Friedmann-Robertson-Walker backgrounds and allow the growth of magnetic fields on super-Hubble scales. We relate the strength of the fields generated by this mechanism with the power spectrum of scalar perturbations and estimate the amplification on galactic scales for different values of the spectral index. Finally we discuss the possible effects of finite conductivity during reheating.hep-ph/0008288CERN-TH-2000-258CERN-TH-2000-258oai:cds.cern.ch:4554842000-08-28 |
| spellingShingle | Particle Physics - Phenomenology Maroto, Antonio Lopez Primordial magnetic fields from metric perturbations |
| title | Primordial magnetic fields from metric perturbations |
| title_full | Primordial magnetic fields from metric perturbations |
| title_fullStr | Primordial magnetic fields from metric perturbations |
| title_full_unstemmed | Primordial magnetic fields from metric perturbations |
| title_short | Primordial magnetic fields from metric perturbations |
| title_sort | primordial magnetic fields from metric perturbations |
| topic | Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1103/PhysRevD.64.083006 http://cds.cern.ch/record/455484 |
| work_keys_str_mv | AT marotoantoniolopez primordialmagneticfieldsfrommetricperturbations |