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arxiv 0802.2068 v3 pith:5RSS2IV3 submitted 2008-02-14 astro-ph gr-qchep-th

Vector Inflation

classification astro-ph gr-qchep-th
keywords fieldsvectorinflationcoupledexpansionfieldmassivemodel
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We propose a scenario where inflation is driven by non-minimally coupled massive vector fields. In an isotropic homogeneous universe these fields behave in presicely the same way as a massive minimally coupled scalar field. Therefore our model is very similar to the model of chaotic inflation with scalar field. For vector fields the isotropy of expansion is achived either by considering a triplet of orthogonal vector fields or for the expense of $N$ randomly oriented vector fields. In the last case the substantial anisotropy of the expansion of order $1/\sqrt{N}$ survives until the end of inflation. The lightest vector fields might also force the late time acceleration of the Universe.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Inflation with vector fields revisited: non-Gaussianities

    hep-th 2026-05 unverdicted novelty 5.0

    In kinetically coupled vector inflation, the bispectrum in the large-h regime exhibits competing local and flattened non-Gaussian signals with distinct h scalings that distinguish vector-supported dynamics.

  2. The Status of Gravitational Vector Perturbations with Recent CMB Data

    astro-ph.CO 2026-05 unverdicted novelty 4.0

    Recent CMB datasets tighten 95% CL upper bounds on vector-mode amplitude r_v to 1.3e-4 (neutrino isocurvature), 6.8 (octupole), and 4.2 (sourced) at k=0.05 Mpc^-1, with no significant detection.