论文标题
共形/庞加莱的宇宙，宇宙学和Lovelock术语的后代
Conformal/Poincaré Coset, Cosmology, and Descendants of Lovelock Terms
论文作者
论文摘要
我们计算了一个引力场理论的六个不变术语，该理论非线性地意识到了保形/庞加莱商，并在仅保留共形模式时将其降低到极限中的已知共形仪。六个术语中有五个是常规的cOSET项，而第六个是wess-zumino（WZ）术语，它为痕量异常提供了众所周知的重力作用。所获得的术语可以嵌入量子有效场理论（EFT）中，而不会破坏其关键特征，尽管以某些微调为代价。但是，EFT中出现的其他大型模式会很麻烦，但是，对于次级倾向的曲线，它们的质量是（超级） - 普兰基人，因此各自的状态不在EFT政权之外。我们讨论了该理论的某些新颖的宇宙学解决方案及其在EFT中的有效性。此外，我们表明，除Wz项外，获得的4D项也可以从更高维度的lovelock项中得出，通过将后者根据定义明确的算法将后者减少到真正的四维项。
We calculate six invariant terms of a gravitational field theory that nonlinearly realizes the Conformal/Poincaré quotient, and reduce to the known conformal Galileons in the limit when only the conformal mode is kept. Five of the six terms are regular coset terms, while the sixth is a Wess-Zumino (WZ) term that gives the well-known gravitational action for the trace anomaly. The obtained terms can be embedded in a quantum effective field theory (EFT) without spoiling their key features, although at a cost of certain fine tunings. The additional massive modes that appear in the EFT would have been troublesome, however, for sub-Planckian curvatures their masses are (super)-Planckian and therefore the respective states are outside of the EFT regime. We discuss certain novel cosmological solution of this theory and their validity within the EFT. Furthermore, we show that the obtained 4D terms, except the WZ term, can also be derived from higher dimensional Lovelock terms by reducing the latter to the genuinely four dimensional terms according to a well-defined algorithm.
