Folded Inflation, Primordial Tensors, and the Running of the Scalar Spectral Index

Details Folded Inflation, Primordial Tensors, and the Running of the Scalar Spectral Index Folded Inflation, Primordial Tensors, and the Running of the Scalar Spectral Index

2004-07-06

arxiv.org/abs/hep-th/0407042v3

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, no figures [typos fixed]

Scientific paper

I discuss folded inflation, an inflationary model embedded in a multi-dimensional scalar potential, such as the stringy landscape. During folded inflation, the field point evolves along a path that turns several corners in the potential. Folded inflation can lead to a relatively large tensor contribution to the Cosmic Microwave Background, while keeping all fields smaller than the Planck scale. I conjecture that if folded inflation generates a significant primordial tensor amplitude, this will generically be associated with non-trivial scale dependence in the spectrum of primordial scalar perturbations.

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