论文标题
普通单场通货膨胀的原始张量非高斯语言，具有非束式戴维的初始状态
Primordial tensor non-Gaussianities from general single-field inflation with non-Bunch-Davies initial states
论文作者
论文摘要
已经发现，在非束缚戴维的初始状态下，与Bunch-Davies的原始扰动的原始非高斯性可以增强，这是由于subhorizon量表上的扰动之间的相互作用，因此可以增强曲率扰动。本文的目的是研究是否通过相同的机制也可以增强张量非高斯。我们考虑了在存在充气的情况下的一般重力理论，并评估了张量自动 - 双光谱和跨双光谱，涉及一种张量和两个标量模式，具有张量模式的非束式戴维斯的初始状态。与标量自动双光谱的情况相比，至关重要的差异是，张量的三分函数在扁平的动量三角形下消失。我们指出，由于非束缚戴维的初始状态，在非平凡的三角形形状上可能会增强跨双光谱。
It has been found that the primordial non-Gaussianity of the curvature perturbation in the case of non-Bunch-Davies initial states can be enhanced compared with those in the case of the Bunch-Davies one due to the interactions among the perturbations on subhorizon scales. The purpose of the present paper is to investigate whether tensor non-Gaussianities can also be enhanced or not by the same mechanism. We consider general gravity theory in the presence of an inflaton, and evaluate the tensor auto-bispectrum and the cross-bispectrum involving one tensor and two scalar modes with the non-Bunch-Davies initial states for tensor modes. The crucial difference from the case of the scalar auto-bispectrum is that the tensor three-point function vanishes at the flattened momentum triangles. We point out that the cross-bispectrum can potentially be enhanced at non-trivial triangle shapes due to the non-Bunch-Davies initial states.
