Inter-Bubble Connections in Inflationary Multiverse Models?

Click For Summary

Discussion Overview

The discussion revolves around the possibility of inter-bubble connections in inflationary multiverse models, specifically whether any form of connection, akin to an Einstein-Rosen Bridge, could allow for the transfer of information between different "bubble universes." The scope includes speculative theoretical concepts and the implications of current models in cosmology.

Discussion Character

  • Exploratory
  • Debate/contested

Main Points Raised

  • One participant suggests that connections between bubble universes might be possible, drawing a parallel to Einstein-Rosen Bridges, though acknowledging the speculative nature of the idea.
  • Another participant argues that the bubble universe concept does not utilize the Schwarzschild spacetime geometry, implying that Einstein-Rosen Bridges are not applicable.
  • A later reply clarifies that the initial suggestion was meant to explore any form of connection, not strictly an Einstein-Rosen Bridge, but concludes that current models do not support such connections.
  • There is a consensus that, as far as current models are concerned, no connections between bubble universes have been proposed that would allow for the transfer of information.

Areas of Agreement / Disagreement

Participants generally agree that current models do not support the possibility of connections between bubble universes, although the initial question raised some speculative ideas that were contested.

Contextual Notes

The discussion highlights the speculative nature of the topic and the limitations of current models in addressing inter-bubble connections. There is an acknowledgment of the differences between the mechanisms of Einstein-Rosen Bridges and the proposed bubble universe models.

nomadreid
Gold Member
Messages
1,773
Reaction score
256
I know this is getting into the highly speculative, but given the mathematics that has been done on versions of these concepts that are not known to be inconsistent:
In the inflation concept which leads to a multiverse of the "bubble universes" type, in which the laws governing the space-time of one universe might be (or not) different from those of another (e.g., perhaps different zero-point energies), would anything analogous to an Einstein-Rosen Bridge be possible, that is, some sort of connection in which something could pass from one "bubble" to another?
 
Space news on Phys.org
nomadreid said:
would anything analogous to an Einstein-Rosen Bridge be possible

No. The "bubble universe" concept does not use anything like the Schwarzschild spacetime geometry or its "wormhole" analogues, which are the ones in which the Einstein-Rosen bridge appears.
 
  • Like
Likes   Reactions: nomadreid
Thanks for your answer, PeterDonis. Actually, I should have put "reminiscent of" rather than "analogous to", emphasizing that I did not necessarily mean the same mechanisms as the Einstein-Rosen Bridge, but rather whether it was possible for any information to go from one "bubble" to another. I would guess from your answer that, as the only connections which are presently speculated are of the Einstein-Rosen bridge variety, that the answer to this question would be included in your "no". Right?
 
nomadreid said:
whether it was possible for any information to go from one "bubble" to another.

As far as I know this is not possible in any of the models which have been proposed.

nomadreid said:
the only connections which are presently speculated are of the Einstein-Rosen bridge variety

I'm not aware of any speculations that propose Einstein-Rosen bridges between bubble universes. Have you seen any? Or are you just referring to the "standard" Einstein-Rosen bridge models, which, as I said, apply to a different class of spacetimes entirely and have nothing to do with the "bubble universe" models?
 
  • Like
Likes   Reactions: nomadreid
No, I was referring to any bridge of some nature (not Einstein-Rosen, which as you point out is not applicable in this situation) between the bubble universes . So your
PeterDonis said:
As far as I know this is not possible in any of the models which have been proposed.
quite well answers it, thanks!:smile:
 

Similar threads

High School Looking to get a better understanding of bubble universe formation
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Is there any inflationary model without a fundamental theory?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Some questions about Cosmic Inflation
  • · Replies 4 ·
Replies
4
Views
5K
Graduate Can Inflation Avoid Selfreproduction?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Transferring Matter between Bubble Universes
  • · Replies 3 ·
Replies
3
Views
3K
Graduate Can Cosmic Inflation and String Theory change fundamental laws?
  • · Replies 4 ·
Replies
4
Views
4K
High School How constrained are the initial conditions of the universe?
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Some questions about Coleman's Baby Universe model
  • · Replies 1 ·
Replies
1
Views
4K
Graduate Inflationary Models: A Dead End?
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Multiverse theory with impossible universes?
  • · Replies 1 ·
Replies
1
Views
3K