On cosmic inflation in vector field theories

Abstract

We investigate the longitudinal ghost issue in Abelian vector inflation. It turns out that, within the class of Lorentz-invariant vector field theories with three degrees of freedom and without any extra (scalar) fields, the possibilities are essentially exhausted by the classical solution due to Larry Ford with an extremely flat potential which doesn't feel the fast roll of its argument. And, moreover, one needs to fulfil an extra condition on that potential in order to avoid severe gradient instability. At the same time, some Lorentz-violating modifications are worth to be explored.

10 pages; a few minor typos corrected; published version

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Cited by in corpus (19)

• Gauge Fields and Inflation
• Extended Gauss-Bonnet gravities in Weyl geometry
• Cosmology for quadratic gravity in generalized Weyl geometry
• Coupled three-form dark energy
• Issues on Generating Primordial Anisotropies at the End of Inflation
• Attractor behaviour in ELKO cosmology
• Disformal vectors and anisotropies on a warped brane
• Anisotropic power-law inflation for a conformal-violating Maxwell model
• Perturbations and non-Gaussianities in three-form inflationary magnetogenesis
• Vector inflation by kinetic coupled gravity
• Doubly-boosted vector cosmologies from disformal metrics
• On hyperbolicity violations in cosmological models with vector fields
• Inflation with antisymmetric tensor field: new candidates
• Inflation using a triplet of Antisymmetric tensor fields
• Reheating and Leptogenesis after Vector inflation
• Gauge inflation by kinetic coupled gravity
• Scalar and vector modes in inflation with antisymmetric tensor field
• Cosmology of the non-local Proca theory
• On the coupling of vector fields to the Gauss-Bonnet invariant