Stability of the Einstein static Universe in the scalar-tensor theory of gravity
Stability of the Einstein static Universe in the scalar-tensor theory of gravity
复制标题
引力标量张量理论中爱因斯坦静态宇宙的稳定性
DOI：
10.1088/0264-9381/33/21/215011
复制
发表时间：
2016
影响因子：
3.5
通讯作者：
Yu Hongwei
中科院分区：
文献类型：
--
作者：
Miao Haitao;Wu Puxun;Yu Hongwei
本文通过分析爱因斯坦静态宇宙的稳定性，研究了标量-张量引力理论中无奇点涌现方案的可行性。为了获得分析结果，我们假设充满我们宇宙的完美流体是辐射或无压物质。我们发现，当标量扰动和张量扰动一起考虑时，不存在稳定的ES解。因此，在标量-张量引力理论中，如果存在正常的理想流体，例如辐射或无压物质，那么突现机制就不能用来避免大爆炸奇点，因为宇宙不可能永远保持在ES状态。
In this paper, we study the viability of a singularity-free emergent scenario in the scalar–tensor theory of gravity by analyzing the stability of the Einstein static (ES) Universe. In order to obtain analytical results, we assume the perfect fluid which fills our Universe to be radiation or pressureless matter. We find that there are no stable ES solutions when scalar perturbations and tensor ones are considered together. Thus, in the scalar–tensor theory of gravity with a normal perfect fluid, such as radiation or pressureless matter, the emergent mechanism cannot be used to avoid the big bang singularity as the Universe cannot stay at the ES state past-eternally.