Nonlocal Inflation
arXiv:0811.0814 · doi:10.1139/P08-089
Abstract
We consider the possibility of realizing inflation in nonlocal field theories containing infinitely many derivatives. Such constructions arise naturally in string field theory and also in a number of toy models, such as the p-adic string. After reviewing the complications (ghosts and instabilities) that arise when working with high derivative theories we discuss the initial value problem and perturbative stability of theories with infinitely many derivatives. Next, we examine the inflationary dynamics and phenomenology of such theories. Nonlocal inflation can proceed even when the potential is naively too steep and generically predicts large nongaussianity in the Cosmic Microwave Background.
6 pages, no figures. Conference proceedings for Theory Canada 4. Accepted for publication in the Canadian Journal of Physics
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Cited by in corpus (14)
- p-Adic Mathematical Physics
- Towards a Resolution of the Cosmological Singularity in Non-local Higher Derivative Theories of Gravity
- Inflation, Cosmic Perturbations and Non-Gaussianities
- Particle Production During Inflation: Observational Constraints and Signatures
- A New Formulation of the Initial Value Problem for Nonlocal Theories
- Nongaussianity from Particle Production During Inflation
- Cosmological Daemon
- Localization of nonlocal cosmological models with quadratic potentials in the case of double roots
- Primordial Density Perturbations and Reheating from Gravity
- FRW Cosmology with Non-positively Defined Higgs Potentials
- Towards an Observational Appraisal of String Cosmology
- Possible Enhancement of High Frequency Gravitational Waves
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