Trans-Planckian Physics and Non-Commutative Inflation
Abstract
Description
Non-commutativity of spacetime at the Planck scale may deform the usual dispersion relations. And these deformed dispersion relations could lead to the accelerating phase without a scalar field. In this paper, we have calculated the spectral index and the running of spectral index in a non-commutative inflation model. Non-commutative inflation with thermal radiation gives a scale invariant spectrum in the limit $w \to -1$ and negative running spectral index which are consistent with the WMAP 3-year results.
11pages, 1 figure, To appear in the Proceedings of the CospA 2007, Taiwan
11pages, 1 figure, To appear in the Proceedings of the CospA 2007, Taiwan