Effects of space-time noncommutativity on the angular power spectrum of the CMB
High Energy Physics - Theory
2010-04-05 v4 Astrophysics
Abstract
We investigate an inflationary model of the universe based on the assumption that space-time is noncommutative in the very early universe. We analyze the effects of space-time noncommutativity on the quantum fluctuations of an inflaton field and investigate their contributions to the cosmic microwave background (CMB). We show that the angular power spectrum l(l+1)C_l generically has a sharp damping for lower l if we assume that the last scattering surface is traced back to fuzzy spheres at the times when large-scale modes cross the Hubble horizon.
Keywords
Cite
@article{arxiv.hep-th/0307029,
title = {Effects of space-time noncommutativity on the angular power spectrum of the CMB},
author = {Masafumi Fukuma and Yuji Kono and Akitsugu Miwa},
journal= {arXiv preprint arXiv:hep-th/0307029},
year = {2010}
}
Comments
17 pages, 4 figures, references added, some arguments clarified, to appear in Nuclear Physics B