Harrison--Zeldovich spectrum from conformal invariance
arXiv:0906.3693 · doi:10.1088/1475-7516/2009/09/030
Abstract
We show that flat spectrum of small perturbations of field(s) is generated in a simple way in a theory of multi-component scalar field provided this theory is conformally invariant, it has some global symmetry and the quartic potential is negative. We suggest a mechanism of converting these field perturbations into adiabatic scalar perturbations with flat spectrum.
14 pages, 1 figure
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