标题： 光锥波动能否通过宇宙学背景进行探测？ 显示英文标题

标题： Can Lightcone Fluctuations be Probed with Cosmological Backgrounds?

摘要： 在宇宙学观测中寻找量子引力的特征现在正在理论和实验两方面积极进行。 近期的研究集中在寻找宇宙微波背景辐射（CMB）中光锥涨落的特征。 因为在暴胀情景中，引力波背景（GWB）总是在CMB之前很久就被发出，因此我们可以假设如果能够观测到这个GWB，那么光锥涨落对此GWB会有什么印记。 我们表明，由于GWB谱的平坦性质，光锥涨落的影响可以忽略不计。 显示英文摘要

摘要： Finding signatures of quantum gravity in cosmological observations is now actively pursued both from the theoretical and the experimental side. Recent work has concentrated on finding signatures of light-cone fluctuations in the CMB. Because in inflationary scenarios a Gravitational Wave Background (GWB) is always emitted much before the CMB, we can ask, in the hypothesis where this GWB could be observed, what is the imprint of light cone fluctuations on this GWB. We show that due to the flat nature of the GWB spectrum, the effect of lightcone fluctuations are negligible.