Weyl R2 inflation with an emergent Planck scale

False Vacuum Inflation Beyond the Planck Scale in Supergravity

We present a false vacuum inflationary scenario in which the inflaton field takes values considerably larger than the Planck scale. It is based on a class of inflationary potentials which can be derived from singular Kähler potentials in supergravity. Our scenario allows for a detectable gravitational wave contribution to the microwave background anisotropy.

Inflation From Symmetry Breaking Below the Planck Scale

We investigate general scalar field potentials V (φ) for inflationary cosmology arising from spontaneous symmetry breaking. We find that potentials which are dominated by terms of order φm with m > 2 can satisfy observational constraints at an arbitrary symmetry breaking scale. Of particular interest, the spectral index of density fluctuations is shown to be independent of the specific form of ...

Effective Planck mass and the scale of inflation

A recent paper argued that it is not possible to infer the energy scale of inflation from the amplitude of tensor fluctuations in the Cosmic Microwave Background, because the usual connection is substantially altered if there are a large number of universally coupled fields present during inflation, with mass less than the inflationary Hubble scale. We give a simple argument demonstrating that ...

The effective Planck mass and the scale of inflation

Observable quantities in cosmology are dimensionless, and therefore independent of the units in which they are measured. This is true of all physical quantities associated with the primordial perturbations that source cosmic microwave background anisotropies such as their amplitude and spectral properties. However, if one were to try and infer an absolute energy scale for inflation-a priori, on...

Unified Model for Inflation and Dark Energy with Planck-Scale Pseudo-Goldstone Bosons