论文标题
模拟引力的紧急情况
Emergent scenario in mimetic gravity
论文作者
论文摘要
新兴场景通过假设宇宙起源于爱因斯坦静态状态，提供了一种避免大爆炸奇点的可能方法。因此，在扰动下稳定的爱因斯坦静态宇宙对于成功实施紧急机制至关重要。在本文中，我们分析了爱因斯坦静态宇宙对模拟理论中标量扰动的稳定性，并发现在该理论的某些条件下，稳定的爱因斯坦静态溶液存在。在原始的模仿重力中，爱因斯坦静态宇宙不稳定。然后，我们发现宇宙自然可以从最初的静态状态退出，发展成为通货膨胀时代，然后退出通货膨胀时代。因此，新兴方案可用于解决模拟理论中的大爆炸奇点。
The emergent scenario provides a possible way to avoid the big bang singularity by assuming that the universe originates from an Einstein static state. Therefore, an Einstein static universe stable under perturbations is crucial to a successful implementation of the emergent mechanism. In this paper, we analyze the stability of the Einstein static universe against the scalar perturbations in the mimetic theory and find that stable Einstein static solutions exist under certain conditions in this theory. In the original mimetic gravity, the Einstein static universe is unstable. Then, we find that the universe can naturally exit from the initial static state, evolve into an inflationary era and then exit from the inflationary era. Thus, the emergent scenario can be used to resolve the big bang singularity in the mimetic theory.
