随机暴胀的小噪声展开
宇宙学与河外天体物理
2025-04-02 v2 广义相对论与量子宇宙学
摘要
通过引入小噪声展开技术，我们展示了完全非线性（非马尔可夫）随机暴胀系统可以重新表述为无限维维纳过程（白噪声随机方程）的集合。作为副产品，我们证明了Starobinsky检验场近似可能仅提供宇宙学扰动的线性区域信息，而标量场非高斯性可能仅在慢滚参数的首阶出现。
引用
@article{arxiv.2410.17987,
title = {Small noise expansion of stochastic inflation},
author = {Diego Cruces and Cristiano Germani and Amin Nassiri-Rad and Masahide Yamaguchi},
journal= {arXiv preprint arXiv:2410.17987},
year = {2025}
}
备注
26 pages 2 appendices. This version corrects errors in the calculations of Section 5.2 from the previous draft (Section 6 in the current version). The main conclusions remain unchanged. Accepted for publication in JCAP