The initial conditions of the universe: how much isocurvature is allowed?
Astrophysics
2016-08-30 v1 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
We investigate the constraints imposed by the current data on correlated mixtures of adiabatic and non-adiabatic primordial perturbations. We discover subtle flat directions in parameter space that tolerate large (~60%) contributions of non-adiabatic fluctuations. In particular, larger values of the baryon density and a spectral tilt are allowed. The cancellations in the degenerate directions are explored and the role of priors elucidated.
Cite
@article{arxiv.astro-ph/0401417,
title = {The initial conditions of the universe: how much isocurvature is allowed?},
author = {M. Bucher and J. Dunkley and P. G. Ferreira and K. Moodley and C. Skordis},
journal= {arXiv preprint arXiv:astro-ph/0401417},
year = {2016}
}
Comments
4 pages, 4 figures. Submitted to PRL