Cosmological perturbations and short distance physics from Noncommutative Geometry
High Energy Physics - Theory
2009-11-07 v2 Astrophysics
General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We investigate the possible effects on the evolution of perturbations in the inflationary epoch due to short distance physics. We introduce a suitable non local action for the inflaton field, suggested by Noncommutative Geometry, and obtained by adopting a generalized star product on a Friedmann-Robertson-Walker background. In particular, we study how the presence of a length scale where spacetime becomes noncommutative affects the gaussianity and isotropy properties of fluctuations, and the corresponding effects on the Cosmic Microwave Background spectrum.
Cite
@article{arxiv.hep-th/0203099,
title = {Cosmological perturbations and short distance physics from Noncommutative Geometry},
author = {Fedele Lizzi and Gianpiero Mangano and Gennaro Miele and Marco Peloso},
journal= {arXiv preprint arXiv:hep-th/0203099},
year = {2009}
}
Comments
Published version, 16 pages