永恒膨胀背景下的伽利略群岛
Galilean Islands in Eternally Inflating Background
摘要：
我们表明，观测宇宙可能出现经典的低能量标度的德西特背景。通过计算曲率扰动，我们发现，这种情况实际上是一种永恒的膨胀情况，即某些区域将经历缓慢膨胀的伽利略起源阶段，随着能量密度的迅速增加而成为岛屿宇宙，而另一些区域仍在永恒的膨胀中，这将为更多的岛屿宇宙的出现创造空间。
英文摘要：
We show that the observational universe may emerge classically from a de Sitter background with low energy scale. We find, after calculating the curvature perturbation, that the resulting scenario is actually a style of the eternal inflation scenario, in which some regions will go through the slowly expanding Galilean genesis phase with the rapidly increasing energy density and become island universes, while other regions are still eternally inflating, which will make the room for more island universes to emerge.
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