Cosmological perturbations in SFT inspired non-local scalar field models

被引：0
|
作者：
Alexey S. Koshelev
Sergey Yu. Vernov
机构：
[1] Vrije Universiteit Brussel and The International Solvay Institutes,Theoretische Natuurkunde
[2] Instituto de Ciencias del Espacio (ICE/CSIC) and Institut d’Estudis Espacials de Catalunya (IEEC),Theoretical High Energy Physics Division, Skobeltsyn Institute of Nuclear Physics
[3] Lomonosov Moscow State University,undefined
来源：
The European Physical Journal C | 2012年 / 72卷
关键词：
Scalar Field; Cosmological Model; Momentum Tensor; Background Solution; Scalar Perturbation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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. We also show that vector and tensor perturbations are absent in this set-up.
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