Cosmological perturbations and short distance physics from Noncommutative Geometry

Details Cosmological perturbations and short distance physics from Noncommutative Geometry Cosmological perturbations and short distance physics from Noncommutative Geometry

2002-03-11

arxiv.org/abs/hep-th/0203099v2

JHEP 0206:049,2002

Physics

High Energy Physics

High Energy Physics - Theory

Published version, 16 pages

Scientific paper

10.1088/1126-6708/2002/06/049

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.

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