论文标题
爱因斯坦和de de sterter宇宙的稳定性在修饰的重力的二次理论中
Stability of Einstein and de Sitter Universes in the Quadratic Theory of Modified Gravity
论文作者
论文摘要
我们考虑了爱因斯坦静态和DE Sitter Universe解决方案，并在二次修改的重力理论的子类中检查它们的不稳定性。 NASH提出的这种修改是一种试图概括一般相对论的尝试。有趣的是，我们发现爱因斯坦静态宇宙在修饰的重力的背景下是不稳定的。与爱因斯坦静态宇宙相反，在度量扰动下，De Sitter Universe保持稳定，直到第二阶。
We consider the Einstein static and the de Sitter universe solutions and examine their instabilities in a subclass of quadratic modified theories for gravity. This modification proposed by Nash is an attempt to generalize general relativity. Interestingly, we discover that the Einstein static universe is unstable in the context of the modified gravity. In contrast to Einstein static universe, the de Sitter universe remains stable under metric perturbation up to the second order.
