论文标题
宇宙学中长张量模式的物理内容
The Physical Content of Long Tensor Modes in Cosmology
论文作者
论文摘要
我们分析了涉及长波长张量扰动的挤压双光谱的物理含量，表明这些模式不能被消除，除了无限波长的确切（非物理）极限，$ k = 0 $。该结果直接暗示着由通货膨胀模型的子类尊重的Maldacena一致性关系的有效性。因此，在挤压的极限中，如标量表量表量表的情况下，可以通过未来的实验观察到挤压的混合相关器，这仍然是研究早期宇宙物理学并区分不同膨胀模型的关键通道。
We analyze the physical content of squeezed bispectra involving long-wavelength tensor perturbations, showing that these modes cannot be gauged away, except for the exact (unphysical) limit of infinite wavelength, $k = 0$. This result has a direct implication on the validity of the Maldacena consistency relation, respected by a subclass of inflationary models. Consequently, in the squeezed limit, as in the case of the scalar-scalar-scalar bispectrum, squeezed mixed correlators could be observed by future experiments, remaining a key channel to study Early Universe physics and discriminate among different models of inflation.
