Cosmological perturbations in SFT inspired non-local scalar field models

被引：29
作者：
Koshelev, Alexey S. [1 ,2 ]
Vernov, Sergey Yu [3 ,4 ,5 ]
机构：
[1] Vrije Univ Brussel, B-1050 Brussels, Belgium
[2] Int Solvay Inst, B-1050 Brussels, Belgium
[3] Fac Ciencies, Inst Ciencias Espacio ICE CSIC, Barcelona 08193, Spain
[4] Fac Ciencies, IEEC, Barcelona 08193, Spain
[5] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Theoret High Energy Phys Div, Moscow 119991, Russia
来源：
EUROPEAN PHYSICAL JOURNAL C | 2012年 / 72卷 / 10期
基金：
俄罗斯基础研究基金会;
关键词：
DARK ENERGY; CONSTRAINTS; INFLATION; GRAVITY; TACHYON; OMEGA(LAMBDA); LOCALIZATION; SUPERNOVAE; CONSTANT; LECTURES;
D O I：
10.1140/epjc/s10052-012-2198-4
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
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.
引用
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页码：1 / 14
页数：14
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