Mimicking alternatives to inflation with interacting spectator fields
Cosmology and Nongalactic Astrophysics
2019-01-29 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
It has been argued that oscillatory features from spectator fields in the primordial power spectrum could be a probe of alternatives to inflation. In this work, we soften this claim by showing that the frequency and amplitude dependence of the patterns appearing in these scenarios could be mimicked by field interactions during inflation. The degeneracy of the frequency holds for the -point correlation functions, while the degeneracy of the amplitude is broken at the level of non-gaussianities.
Cite
@article{arxiv.1811.08224,
title = {Mimicking alternatives to inflation with interacting spectator fields},
author = {Guillem Domènech and Javier Rubio and Julius Wons},
journal= {arXiv preprint arXiv:1811.08224},
year = {2019}
}
Comments
8 pages, 4 figures, added references and clarifications - matches published version