具有原始非高斯性的时间切片微扰理论和大体积流对暴胀振荡特征的影响
Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features
摘要：
我们将宇宙学大尺度结构的时间切片微扰理论（TSPT）的形式扩展到非高斯初始条件。我们表明，在这种情况下，TSPT相互作用顶点获得新的贡献，其时间依赖因式分解的爱因斯坦-德西特宇宙学。新的配方是免费的虚假红外（IR）增强，并揭示了一个清晰的非高斯顶点的IR结构。我们使用新的技术来研究原始统计中振荡特征的演化，并表明它们是由于大体积流量的非线性效应而阻尼的。通过对相关费曼图的系统红外重建，我们导出了振荡原始功率谱和双谱的阻尼因子。
英文摘要：
We extend the formalism of time-sliced perturbation theory (TSPT) for cosmological large-scale structure to include non-Gaussian initial conditions. We show that in such a case the TSPT interaction vertices acquire new contributions whose time-dependence factorizes for the Einstein-de Sitter cosmology. The new formulation is free from spurious infrared (IR) enhancements and reveals a clear IR structure of non-Gaussian vertices. We use the new technique to study the evolution of oscillating features in primordial statistics and show that they are damped due to non-linear effects of large bulk flows. We derive the damping factors for the oscillating primordial power spectrum and bispectrum by means of a systematic IR resummation of relevant Feynman diagrams.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
