原初暴胀期间非定域引力的稳定性问题
高能物理 - 理论
2018-11-30 v4 宇宙学与河外天体物理
摘要
我们研究了当初始条件设定在原初暴胀阶段时,某些非定域引力模型的宇宙学演化。我们特别考察了先前由我们小组引入的三个模型,即所谓的 RT、RR 和 模型。我们发现 RR 和 模型在暴胀期间也具有稳定的演化。RT 模型存在表观不稳定性,但我们证明,由于非定域项相关的尺度与暴胀尺度相比很小,这种不稳定性是无害的,并且即使其初始条件设定在原初暴胀阶段,RT 模型也具有可行的演化。
引用
@article{arxiv.1610.05664,
title = {Stability issues of nonlocal gravity during primordial inflation},
author = {Enis Belgacem and Giulia Cusin and Stefano Foffa and Michele Maggiore and Michele Mancarella},
journal= {arXiv preprint arXiv:1610.05664},
year = {2018}
}
备注
v3: important error corrected, which changes a conclusion (RT model viable also when initial conditions are set during inflation); v4: corrected an error in the v3 submission (abstract in the arxiv form had not been changed)