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arXiv · hep-th/0203099

Cosmological perturbations and short distance physics from Noncommutative Geometry

Fedele Lizzi·Gianpiero Mangano·Gennaro Miele·Marco Peloso
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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.

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Fedele Lizzi, Gianpiero Mangano, Gennaro Miele, Marco Peloso. 2002-07-02. Cosmological perturbations and short distance physics from Noncommutative Geometry. https://doi.org/10.1088/1126-6708%2F2002%2F06%2F049

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