论文标题
局部观察者对宇宙软定理的影响
Local observer effect on the cosmological soft theorem
论文作者
论文摘要
在软限制中，原始扰动的非高斯语言提供了有关通货膨胀期间自由度的重要信息。对于局部观察者而言，曲率扰动的软模式是对空间坐标的重新缩放。我们确定折叠极限中的三光谱如何由于软模式而被重新缩放而移动。我们发现$ f _ {\ rm nl} $和$τ_ {\ rm nl} $参数之间的不等式形式不受重新续订的影响，这表明不平等作为自由度的指示仍然是完整的。我们还评论了当地观察者对超慢滚通膨胀的一致性关系的影响。
Non-Gaussianities of primordial perturbations in the soft limit provide the important information about the light degrees of freedom during inflation. The soft modes of the curvature perturbations, unobservable for a local observer, act as rescaling the spatial coordinates. We determine how the trispectrum in the collapsed limit is shifted by the rescaling due to the soft modes. We find the form of the inequality between $f_{\rm NL}$ and $τ_{\rm NL}$ parameters is not affected by the rescaling, demonstrating that the role of the inequality as an indicator of the light degrees of freedom remains intact. We also comment on the local observer effect on the consistency relation for ultra slow-roll inflation.
