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Preheating with non-standard kinetic term

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Published 22 April 2009 Published under licence by IOP Publishing Ltd
, , Citation Jean Lachapelle and Robert H. Brandenberger JCAP04(2009)020 DOI 10.1088/1475-7516/2009/04/020

1475-7516/2009/04/020

Abstract

We consider reheating after inflation in theories with a non-standard kinetic term. We show that the equation that exhibits parametric resonance is the Hill-Whittaker equation, which is a particular case of the more general Hill equation. This equation is in general more unstable than the Mathieu equation, such that narrow resonance preheating may be efficient in theories with a non-canonical kinetic term.

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10.1088/1475-7516/2009/04/020