Inflation from N-Forms and its stability
arXiv:0903.4158 · doi:10.1088/1126-6708/2009/09/092
Abstract
Anisotropic and isotropic slow-roll inflation supported by n-forms are sought. Canonical field strengths and their duals are taken into account, and they are allowed to have a potential and also, when necessary for slow-roll, a nonminimal curvature coupling. New isotropic solutions are found for three-forms. It is also shown that some n-form actions are equivalent to f(R) gravity and scalar field models with possible nonminimal couplings. Anisotropic solutions are found for two-forms, generalising vector inflation, however, also the two-form is unstable during inflation due to the nonminimal coupling to curvature. We also address the stability of the isotropic background solutions supported by a triad of vectors .
24 pages. Several new paragraphs and clarifications were added. A few typos corrected. JHEP in print
References in corpus (18)
- Inflationary Universe with Anisotropic Hair
- Vector Inflation
- Modified non-local-F(R) gravity as the key for the inflation and dark energy
- Theory of cosmological perturbations in an anisotropic universe
- Inflationary cosmology and the late-time accelerated expansion of the universe in non-minimal Yang-Mills- gravity and non-minimal vector- gravity
- Inflationary perturbations in anisotropic backgrounds and their imprint on the CMB
- Dynamics of Nonlocal Cosmology
- Anisotropic Inflation from Vector Impurity
- Cuscuton Cosmology: Dark Energy meets Modified Gravity
- Newtonian limit of nonlocal cosmology
- Viable Palatini-f(R) cosmologies with generalized dark matter
- Bianchi Model CMB Polarization and its Implications for CMB Anomalies
- Correlating anomalies of the microwave sky: The Good, the Evil and the Axis
- Cosmological perturbations from vector inflation
- Non-minimally coupled vector curvaton
- Microscopic and Macroscopic Behaviors of Palatini Modified Gravity Theories
- The cosmology of the nonsymmetric theory of gravitation
- Three Form Inflation