Generation of a bubble universe and the information loss problem

Understand

We discuss a possible scenario to induce a bubble universe using buildable bubbles.

• First, we observe that if there is no violation of the null energy condition, all bubbles are buildable and do not have inflation if their initial conditions are assigned along the in-going null surface in an almost flat background.
• However, if the null energy condition is sufficiently violated, then the generation of a bubble universe is possible.
• Second, the author will observe that a sufficient violation of the null energy condition may be possible using a buildable bubble due to the Hawking radiation of a de Sitter space.