- #1
Thuring
I’ve understood that within the theory of Eternal Inflation the Bubble Universes that form from a drop of “vacuum” energy expand at the Speed of Light.
My question is:
Why would expansion be at the speed of light and not at a speed proportional to the level of vacuum energy still present in the bubble?
After all, I thought the extremely high vacuum energy was why the “original” mega-universe expands so super-duper quickly and why our bubble expanded so quickly until almost all the vacuum energy decayed and turned into normal mass and energy. Yet, the region of our universe further than the horizon is leaving us faster than light, relative to us, and will get faster.
My question is:
Why would expansion be at the speed of light and not at a speed proportional to the level of vacuum energy still present in the bubble?
After all, I thought the extremely high vacuum energy was why the “original” mega-universe expands so super-duper quickly and why our bubble expanded so quickly until almost all the vacuum energy decayed and turned into normal mass and energy. Yet, the region of our universe further than the horizon is leaving us faster than light, relative to us, and will get faster.