Undergrad Inter-Bubble Connections in Inflationary Multiverse Models?

[nomadreid]

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?

 

[PeterDonis]

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.

 

[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?

 

[PeterDonis]

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.

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?

 

[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

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

quite well answers it, thanks!