论文标题
量子重力的早期宇宙
Early universe in quantum gravity
论文作者
论文摘要
我们在有限的非本地量子重力中介绍了早期宇宙的新图片，这在经典和量子水平上是Weyl不变的。该理论的高能量制度由两个阶段组成，一个阶段，一个不变的跨planckian阶段和planckian或higgs阶段，由RICCI张量中的动作Quadratic描述，而宇宙根据标准辐射模型而演变。在第一阶段，无论该理论的微观细节如何，奇异性，平坦度和地平线问题等热爆炸的所有问题都通过韦伊尔不变性找到了通用而简单的非通货膨胀解决方案。在第二阶段，一旦Weyl对称性自发破碎，就会在渐近地将其作为辐射主导的平坦Friedmann--Lema-tre-lema--Robertson-Robertson-Walker Universe产生原始扰动。
We present a new picture of the early universe in finite nonlocal quantum gravity, which is Weyl invariant at the classical and quantum levels. The high-energy regime of the theory consists of two phases, a Weyl invariant trans-Planckian phase and a post-Planckian or Higgs phase described by an action quadratic in the Ricci tensor and where the cosmos evolves according to the standard radiation-dominated model. In the first phase, all the issues of the hot big bang such as the singularity, flatness, and horizon problems find a universal and simple non-inflationary solution by means of Weyl invariance, regardless of the microscopic details of the theory. In the second phase, once Weyl symmetry is spontaneously broken, primordial perturbations are generated around a background that asymptotically evolves as a radiation-dominated flat Friedmann--Lemaître--Robertson--Walker universe.
