Power Spectra in Spacetime Noncommutative Inflation
Astrophysics
2008-11-26 v4 High Energy Physics - Phenomenology
High Energy Physics - Theory
Abstract
String/M theory inspires an uncertainty relation between space and time which deviates from general relativity. It is possible to explore this deviation from cosmological observations, in particular from the CMB fluctuation spectrum. This paper extends some previous observations to more general inflation schemes, we find that the noncommutative spacetime effects always suppress the power spectrum, of both the scalar and tensor perturbations, and may provide a large enough running of the spectral index to fit the WMAP data in the inflation model.
Cite
@article{arxiv.astro-ph/0311378,
title = {Power Spectra in Spacetime Noncommutative Inflation},
author = {Qing-Guo Huang and Miao Li},
journal= {arXiv preprint arXiv:astro-ph/0311378},
year = {2008}
}
Comments
19 pages, 6 figures, harvmac; 2 references added; only references added; Accepted for publication in Nucl. Phys. B