Vector Perturbations in a Contracting Universe

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dc.creatorBattefeld, Thorsten
dc.creatorBrandenberger, Robert
dc.date2004-06-21
dc.date2004-10-22
dc.date.accessioned2026-07-07T04:17:05Z
dc.date.available2026-07-07T04:17:05Z
dc.descriptionIn this note we show that vector perturbations exhibit growing mode solutions in a contracting Universe, such as the contracting phase of the Pre Big Bang or the Cyclic/Ekpyrotic models of the Universe. This is not a gauge artifact and will in general lead to the breakdown of perturbation theory -- a severe problem that has to be addressed in any bouncing model. We also comment on the possibility of explaining, by means of primordial vector perturbations, the existence of the observed large scale magnetic fields. This is possible since they can be seeded by vorticity.
dc.descriptionv3. Two reference added; Identical with version accepted for publication at PRD
dc.identifierhttps://arxiv.org/abs/hep-th/0406180
dc.identifierhttp://arxiv.org/abs/hep-th/0406180
dc.identifierPhys.Rev. D70 (2004) 121302
dc.identifierdoi:10.1103/PhysRevD.70.121302
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/52613
dc.subjectHigh Energy Physics - Theory
dc.subjectAstrophysics
dc.subjectGeneral Relativity and Quantum Cosmology
dc.subjectHigh Energy Physics - Phenomenology
dc.titleVector Perturbations in a Contracting Universe
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