Graduate Model of the Universe/Multiverse

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Hawking's recent research suggests that the boundaries of multiverses could be finite and smooth, challenging traditional views of infinite inflation. The discussion raises questions about whether multiverses could merge over time, similar to aerosols in the atmosphere. Participants express confusion about the concept of a "radius" of the universe and its center, leading to humorous exchanges. Ultimately, it is concluded that no existing models support the idea of merging multiverses in this manner. The thread is closed with a definitive statement on the lack of supporting models.
Tree Universe
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Hi Everyone,

One of Hawking's last publications studied the model of universe/multiverse and conjectured that the exit from eternal inflation is "finite and reasonably smooth" - in other words, the inflated boundaries of multiverses could be finite and smooth. Here is the paper link - https://link.springer.com/article/10.1007/JHEP04(2018)147.

Does any existing model suggest that there are multiverses inflating in infinite space and eventually merging into bigger universes after a long time, just like aerosols growing and merging in the atmosphere? The universe has such a large radius that it could flatten out like a drop.
 
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Tree Universe said:
The universe has such a large radius that it could flatten out like a drop.
Uh ... the universe has a radius? Really? What is it? Are we at the center? If not, where IS the center?
 
phinds said:
If not, where IS the center?

Fresno.
 
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Vanadium 50 said:
Fresno.
Road Trip! :cool:
 
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Vanadium 50 said:
Fresno.

berkeman said:
Road Trip! :cool:

Next thing I know you guys will be telling me the radius is 42
 
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Tree Universe said:
just like aerosols growing and merging in the atmosphere? The universe has such a large radius that it could flatten out like a drop.

In case it isn't obvious from the previous posts, the answer is "no". There are no models that work like this.

Thread closed.
 

Thread 'Estimates — True Size of the Universe?'

I always thought it was odd that we know dark energy expands our universe, and that we know it has been increasing over time, yet no one ever expressed a "true" size of the universe (not "observable" universe, the ENTIRE universe) by just reversing the process of expansion based on our understanding of its rate through history, to the point where everything would've been in an extremely small region. The more I've looked into it recently, I've come to find that it is due to that "inflation"...
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