Density Perturbations in Chain Inflation

Details Density Perturbations in Chain Inflation Density Perturbations in Chain Inflation

2006-11-22

arxiv.org/abs/hep-ph/0611286v2

JCAP0704:020,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, 16 figures; v2: corrected typos, increased resolution on D=2+1 data points

Scientific paper

10.1088/1475-7516/2007/04/020

We consider the model of ``Chain Inflation,'' in which the period of inflation in our universe took the form of a long sequence of quantum tunneling events. We find that in the simplest such scenario, in which the tunneling processes are uniform, approximately 10^4 vacua per e-folding of inflation are required in order that the density perturbations produced are of an acceptable size. We arrive at this conclusion through a combination of analytic and numerical techniques, which could also serve as starting points for calculations with more general sets of assumptions.

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