Cosmological perturbations in SFT inspired non-local scalar field models
High Energy Physics - Theory
2012-11-06 v3 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
We study cosmological perturbations in models with a single non-local scalar field originating from the string field theory description of the rolling tachyon dynamics. We construct the equation for the energy density perturbations of the non-local scalar field and explicitly prove that for the free field it is identical to a system of local cosmological perturbation equations in a particular model with multiple (maybe infinitely many) local free scalar fields.
Keywords
Cite
@article{arxiv.0903.5176,
title = {Cosmological perturbations in SFT inspired non-local scalar field models},
author = {Alexey S. Koshelev and Sergey Yu. Vernov},
journal= {arXiv preprint arXiv:0903.5176},
year = {2012}
}
Comments
21 pages, no figures, v3: presentation improved, results unchanged, references added