Model of the Universe/Multiverse

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Discussion Overview

The discussion revolves around the concept of the universe and multiverse, particularly in relation to Hawking's conjecture about eternal inflation and the nature of multiverses. Participants explore whether existing models suggest that multiverses could inflate in infinite space and merge into larger universes, drawing analogies to aerosols in the atmosphere.

Discussion Character

  • Exploratory, Debate/contested

Main Points Raised

  • One participant references Hawking's publication suggesting that the exit from eternal inflation could be "finite and reasonably smooth," proposing a model where multiverses might merge.
  • Another participant questions the concept of the universe having a radius and the implications of a center, indicating uncertainty about the foundational assumptions of the discussion.
  • A humorous response suggests "Fresno" as the center of the universe, reflecting a light-hearted tone amidst the technical discussion.
  • A later post asserts that there are no models supporting the merging of multiverses as described, indicating a disagreement with the initial proposal.

Areas of Agreement / Disagreement

Participants express differing views on the nature of the universe's radius and the validity of models suggesting merging multiverses. The discussion remains unresolved, with some participants challenging the initial claims while others maintain their positions.

Contextual Notes

There are limitations regarding the definitions of "radius" and "center" in the context of the universe, as well as the assumptions underlying the proposed models of multiverse inflation and merging.

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.
 

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