Particle Production of Vector Fields: Scale Invariance is Attractive
arXiv:1011.2517 · doi:10.1103/PhysRevD.83.023523
Abstract
In a model of an Abelian vector boson with a Maxwell kinetic term and non-negative mass-squared it is demonstrated that, under fairly general conditions during inflation, a scale-invariant spectrum of perturbations for the components of a vector field, massive or not, whose kinetic function (and mass) is modulated by the inflaton field is an attractor solution. If the field is massless, or if it remains light until the end of inflation, this attractor solution also generates anisotropic stress, which can render inflation weakly anisotropic. The above two characteristics of the attractor solution can source (independently or combined together) significant statistical anisotropy in the curvature perturbation, which may well be observable in the near future.
LaTex, 41 pages, 13 figures, corrected typos and added references
References in corpus (17)
- Inflationary Universe with Anisotropic Hair
- Generation of Large-Scale Magnetic Fields in Single-Field Inflation
- Magnetic fields from inflation?
- Instability of anisotropic cosmological solutions supported by vector fields
- Inflation and late-time cosmic acceleration in non-minimal Maxwell- gravity and the generation of large-scale magnetic fields
- Cosmic Microwave Background Statistics for a Direction-Dependent Primordial Power Spectrum
- Large-scale magnetic fields in the inflationary universe
- Can a vector field be responsible for the curvature perturbation in the Universe?
- Instability of the ACW model, and problems with massive vectors during inflation
- Anisotropic Inflation from Vector Impurity
- The Axis of Evil revisited
- CMB multipole measurements in the presence of foregrounds
- Anisotropic non-Gaussianity from vector field perturbations
- Instabilities in the Aether
- Non-minimally coupled vector curvaton
- Large-scale magnetic fields from inflation due to Chern-Simons-like effective interaction
- Supergravity inspired Vector Curvaton