论文标题
De Sitter Spacetime中的扰动软光子定理
Perturbative soft photon theorems in de Sitter spacetime
论文作者
论文摘要
当曲率长度尺度（$ \ ell $）很大时，我们在限制的局部de保姆背景中定义了扰动的S-矩阵，并研究了在通用维度中De Sitter Spacetimes中标量QED振幅的“软”行为。我们获得了主要的和倾斜的扰动校正，以在较大的$ \ ell $限制中以扁平空间软光子定理，并对这些校正的通用性发表评论。我们将结果与使用经典辐射分析以$ d = 4 $获得的电磁记忆尾巴进行比较。
We define a perturbative S-matrix in a local patch of de Sitter background in the limit when the curvature length scale ($\ell$) is large and study the 'soft' behavior of the scalar QED amplitudes in de Sitter spacetime in generic dimensions. We obtain the leading and subleading perturbative corrections to flat space soft photon theorems in the large $\ell$ limit, and comment on the universality of these corrections. We compare our results with the electromagnetic memory tails obtained earlier in $d=4$ using classical radiation analysis.
