Primordial Adiabatic Fluctuations from Cosmic Defects

P. P. Avelino, C. J. A. P. Martins

Abstract
In the context of ``two-metric'' theories of gravity there is the possibility that cosmic defects will produce a spectrum of primordial adiabatic density perturbations, when the speed characterizing the defect-producing scalar field is much larger than the speed characterizing gravity and standard model particles. This model will exactly mimic the standard predictions of inflationary models, with the exception of a small non-Gaussian signal which could be detected by future experiments.

Physical Review Letters
Volume 85, Page 7
August 2000

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