Chain inflation and the imprint of fundamental physics in the CMBR

Details Chain inflation and the imprint of fundamental physics in the CMBR Chain inflation and the imprint of fundamental physics in the CMBR

2008-09-16

arxiv.org/abs/0809.2707v1

JCAP 0903:007,2009

Physics

High Energy Physics

High Energy Physics - Theory

16 pages

Scientific paper

10.1088/1475-7516/2009/03/007

In this work we investigate characteristic modifications of the spectrum of cosmological perturbations and the spectral index due to chain inflation. We find two types of effects. First, modifications of the spectral index depending on interactions between radiation and the vacuum, and on features of the effective vacuum potential of the underlying fundamental theory. Second, a modulation of the spectrum signalling new physics due to bubble nucleation. This effect is similar to those of transplanckian physics. Measurements of such signatures could provide a wealth of information on the fundamental physics at the basis of inflation.

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