存在真空能量时爱因斯坦静态宇宙的稳定性
Stability of the Einstein static universe in presence of vacuum energy
摘要：
爱因斯坦的静态宇宙在最近提出的一些处理标准宇宙学模型的奇异起源的紧急情况中发挥了核心作用。本文研究了对应于保角不变场的真空能量下爱因斯坦静态解的存在性和稳定性。我们表明，真空能量的存在下，通过改变它的中心平衡点，这是循环稳定的稳定这个解决方案。这使得非奇异的涌现宇宙学模型得以构建，在这种模型中，宇宙最初围绕初始爱因斯坦静态解无限振荡，因此是过去的永恒。
英文摘要：
The Einstein static universe has played a central role in a number of emergent scenarios recently put forward to deal with the singular origin of the standard cosmological model. Here we study the existence and stability of the Einstein static solution in presence of vacuum energy corresponding to conformally-invariant fields. We show that the presence of vacuum energy stabilizes this solution by changing it to a centre equilibrium point, which is cyclically stable. This allows non-singular emergent cosmological models to be constructed in which initially the universe oscillates indefinitely about an initial Einstein static solution and is thus past eternal.
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