Producing a Scale-Invariant Spectrum of Perturbations in a Hagedorn Phase of String Cosmology

Details Producing a Scale-Invariant Spectrum of Perturbations in a Hagedorn Phase of String Cosmology Producing a Scale-Invariant Spectrum of Perturbations in a Hagedorn Phase of String Cosmology

2005-11-14

arxiv.org/abs/hep-th/0511140v2

Phys.Rev.Lett.97:021302,2006

Physics

High Energy Physics

High Energy Physics - Theory

4 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.97.021302

We study the generation of cosmological perturbations during the Hagedorn phase of string gas cosmology. Using tools of string thermodynamics we provide indications that it may be possible to obtain a nearly scale-invariant spectrum of cosmological fluctuations on scales which are of cosmological interest today. In our cosmological scenario, the early Hagedorn phase of string gas cosmology goes over smoothly into the radiation-dominated phase of standard cosmology, without having a period of cosmological inflation.

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