论文标题
空间平坦的FRW中的渐近对称性
Asymptotic symmetries in spatially flat FRW
论文作者
论文摘要
我们对未来无限无穷大的渐近减速空间空间的渐近减速进行了脱壳处理。我们获得了与FRW的全局对称性一致的超级倾斜和超值跨度样的渐近差异性，并且我们计算如何在其下转化渐近数据。此外，我们详细研究了这些差异性对一些简单背景的影响，包括不受干扰的FRW和Sultana-Dyer黑洞。特别是，我们研究了这些转变如何在几种宇宙学上扰动的背景上作用。
We perform an off-shell treatment of asymptotically decelerating spatially flat FRW spacetimes at future null infinity. We obtain supertranslation and superrotation-like asymptotic diffeomorphisms which are consistent with the global symmetries of FRW and we compute how the asymptotic data is transformed under them. Further, we study in detail the effect of these diffeomorphisms on some simple backgrounds including unperturbed FRW and Sultana-Dyer black hole. In particular, we investigate how these transformations act on several cosmologically perturbed backgrounds.
