42 citations · 77 across the 3 of their papers we have counts for
4 papers
Simple single-field inflation models with arbitrarily small tensor/scalar ratio
Nina K. Stein, William H. Kinney
We construct a family of simple single-field inflation models consistent with Planck / BICEP Keck bounds which have a parametrically small tensor amplitude and no running of the sc…
Cyclic Cosmology and Geodesic Completeness
William H. Kinney, Nina K. Stein
We consider recently proposed bouncing cosmological models for which the Hubble parameter is periodic in time, but the scale factor grows from one cycle to the next as a mechanism…
Natural Inflation After Planck 2018
Nina K. Stein, William H. Kinney
We calculate high-precision constraints on Natural Inflation relative to current observational constraints from Planck 2018 + BICEP/Keck(BK15) Polarization + BAO on and ,…
Planck Limits on Non-canonical Generalizations of Large-field Inflation Models
Nina K. Stein, William H. Kinney
In this paper, we consider two case examples of Dirac-Born-Infeld (DBI) generalizations of canonical large-field inflation models, characterized by a reduced sound speed, $c_{S} <…