Explosive particle production in non-commutative inflation

Hideki Perrier, Ruth Durrer, Massimiliano Rinaldi

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We consider a cosmological model which has recently been proposed in the literature and where inflation is induced by corrections to the energy density coming from the non-commutativity of spacetime. We show that the very rapid inflationary expansion typical of this model is responsible for a burst of particle production which ends inflation and leads to a radiation-dominated phase. We analytically estimate the energy density of these particles and we confront the results with more precise numerical calculations. We estimate the number of inflationary e-folds before the back-reaction of the radiation energy density overcomes the non-commutative effects and terminates inflation naturally. © 2013 SISSA, Trieste, Italy.

Original languageEnglish
Article number067
JournalJournal of High Energy Physics
Issue number67
Publication statusPublished - 21 Jan 2013


  • Cosmology of Theories beyond the SM
  • Models of Quantum Gravity
  • Renormalization Regularization and Renormalons


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