Cosmological perturbations in SFT inspired non-local scalar field models

Details Cosmological perturbations in SFT inspired non-local scalar field models Cosmological perturbations in SFT inspired non-local scalar field models

2009-03-30

arxiv.org/abs/0903.5176v2

Physics

High Energy Physics

High Energy Physics - Theory

24 pages, no figures, JHEP3 class; v2: references added and typos corrected

Scientific paper

We study cosmological perturbations in models with a single free non-local scalar field originating from the string field theory description of the rolling tachyon dynamics. We construct equation for the energy density perturbation of the non-local scalar field and explicitly prove that it is identical to a closed system of local cosmological perturbation equations in a particular model with multiple local free scalar fields.

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