Super-inflation and generation of first order vector perturbations in ELKO

Abstract

In this work we construct a model where the first order vector perturbations can be generated during inflationary expansion. For the non-standard spinors, known as ELKO, we show that the components of the first order perturbed energy-momentum tensor of the ELKO is non-zero for pure vector part of the metric perturbation ($B_i$). We show that vector perturbations do not decay in the super-Hubble scale and for a specific super-inflation background model we show that the vector perturbations are nearly scale invariant, while its amplitude is smaller than the primordial scalar perturbations. We also comment on the generation of vorticity.

13 pages

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Cited by in corpus (14)

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• Localization of five-dimensional Elko spinors with non-minimal coupling on thick branes
• Elko and mass dimension one field of spin one half: causality and Fermi statistics
• An unified cosmological evolution driven by a mass dimension one fermionic field
• Degeneracy pressure of mass dimension one fermionic fields and the dark matter halo of galaxies
• Vector Galileon and inflationary magnetogenesis
• A new class of mass dimension one fermions
• Effective field theory of magnetogenesis identify necessary and sufficient conditions
• Localization of five-dimensional Elko Spinors on dS/AdS Thick Branes
• Scalar and vector modes in inflation with antisymmetric tensor field
• Wigner multiplets in QFT: from Wigner degeneracy to Elko fields
• Wigner multiplets in QFT: dark sector and CPT-violating scenarios