论文标题
在当地平均的弗里德曼宇宙和哈勃张力的仪表上不变性
On the gauge invariance of the locally averaged Friedmann Universe and the Hubble tension
论文作者
论文摘要
哈勃张力对标准宇宙学造成了疫病。作为对该问题的可能态度，已经提出了在有限域上引入空间平均以构建局部弗里德曼时空的空间平均，但已经提出了在不均匀宇宙学中扩张率的局部变化。但是，尚不清楚空间平均本身的概念是否不变。即，在特定规格中平均得出的结论在物理上是否有意义。在本文中，我们解决了这个问题，即宇宙学平均空间平均的规格不变性。我们表明，通过研究规范不变宇宙学扰动理论中的空间平均值，答案是积极的。
The Hubble tension cast a blight on the standard cosmology. As a possible attitude to the problem, the local variation of the expansion rate in an inhomogeneous cosmology has been proposed where the spatial averaging over a finite domain was introduced in order to construct local Friedmann spacetime. However, it is not clear that the concept of the spatial averaging itself is gauge invariant or not. Namely the conclusion obtained by the averaging in a particular gauge is physically meaningful or not. In this paper we address this question, namely the gauge invariance of the spatial averaging in cosmology . We show that the answer is positive by studying the spatial average in the gauge-invariant cosmological perturbation theory.
