论文标题
通用后高（无限）衍生引力的通货膨胀后GW产生
Post-inflationary GW production in generic higher (infinite) derivative gravity
论文作者
论文摘要
通过在弯曲术语中添加二次化的方式，可以将重力嵌入可恢复的理论中。但是，这首先导致了Weyl Ghost的存在。如果局部假设被削弱，而重力的传播器则由d'Alembertian操作员的整个功能表示，则可以摆脱这个鬼魂。这种类型的模型承认了一种描述$ r^2 $或Starobinsky通货膨胀的宇宙学解决方案。我们研究了该模型通货膨胀后的重力产生，并表明尽管存在较高的导数算子，但它可能会忽略不计，这可能会导致不稳定性。
Gravity can be embedded into a renormalizable theory by means of adding quadratic in curvature terms. However, this at first leads to the presence of the Weyl ghost. It is possible to get rid of this ghost if the locality assumption is weakened and the propagator of the graviton is represented by an entire function of the d'Alembertian operator without new poles and zeros. Models of this type admit a cosmological solution describing the $R^2$, or Starobinsky, inflation. We study graviton production after inflation in this model and show that it is negligible despite the presence of the higher derivative operators which could potentially cause instabilities.
