通过暴胀前动力学降低张标比
宇宙学与河外天体物理
2020-09-30 v3 广义相对论与量子宇宙学
高能物理 - 唯象学
摘要
已知暴胀前动力学通过暴胀子与引力子场在这些时期的多样动力学留下了可观测印记。此处强调，其他粒子自由度若在前暴胀时期变为非相对论后湮灭并转移其熵，亦能在原初可观测量上留下印记。此类其他粒子的湮灭将导致枢轴尺度（及更大尺度）处张量-标量比（tensor-to-scalar ratio）的降低，从而有助于使那些因当前给出大张标比而不受青睐的势重新与当前观测相符。
引用
@article{arxiv.2005.07527,
title = {Lowering tensor-to-scalar ratio by pre-inflationary dynamics},
author = {Suratna Das},
journal= {arXiv preprint arXiv:2005.07527},
year = {2020}
}
备注
5 pages, no figure, v2: typos corrected, references added, v3: Title changed as per the referee's comment, discussion extended, main results unchanged. Accepted for publication in PRD Rapid Communications