Monday, October 22, 2012

1210.5373 (Hideki Perrier et al.)

Explosive particle production in non-commutative inflation    [PDF]

Hideki Perrier, Ruth Durrer, Massimiliano Rinaldi
We consider a model of inflation 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 terminate inflation naturally.
View original: http://arxiv.org/abs/1210.5373

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