Cosmological perturbations and short distance physics from noncommutative geometry

Fedele Lizzi, Gianpiero Mangano, Gennaro Miele, Marco Peloso

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)1165-1180
Number of pages16
JournalJournal of High Energy Physics
Issue number6
StatePublished - Jun 1 2002

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  • Cosmology of Theories beyond the SM
  • Non-Commutative Geometry


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