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Onyx
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- TL;DR Summary
- Are there any metrics for intra-universe wormholes?
Are there any metrics for intra-universe wormholes?
The most famous wormhole solution, the Ellis wormhole, describes two separate sheets with opposite signs of the radial coordinate. Hence, this is a wormhole that connects two different universes. This article implies that intra-universe metrics are more rare, and says that the Aichelburg-Schein timehole is an example. So actually I already knew that there is such a metric, but my question is what would be the simplest metric to describe one (intra)?Drakkith said:"Intra" means "within", as in within our own universe, which would be redundant since wormholes are already theorized as connecting two places with our universe. Did you mean 'inter-universe' wormholes? As in between two different universes?
Yes.Onyx said:The most famous wormhole solution, the Ellis wormhole, describes two separate sheets with opposite signs of the radial coordinate.
No, not necessarily. Both sheets could be part of the same universe, just in different places.Onyx said:Hence, this is a wormhole that connects two different universes.
That article is somebody's personal blog. It's not a reliable source.Onyx said:This article implies that intra-universe metrics are more rare
Do you mean the blog website posted by the OP:vanhees71 said:Hm, this somebody seems not even to be willing to reveal his name, or didn't I simply not find it on the above linked website?
Onyx said:This article implies that intra-universe metrics
What Peter said in #4, guessing from your paraphrase of what was said.Onyx said:I just emailed a physicist and he said that any intra-universe wormhole can be made into intra with a change in structure, but I'm not quite sure what that means.
Sounds like a little Physicist humor to me...Onyx said:he said that any intra-universe wormhole can be made into intra
Another thought: perhaps a true intra-universe wormhole metric would be one where there is an option for two points to be causally connected via the "long way" or the "short way". In the Ellis wormhole there is only the path through the wormhole.berkeman said:Sounds like a little Physicist humor to me...
Not necessarily. See my post #4.Onyx said:In the Ellis wormhole there is only the path through the wormhole.
But how would a traveller get from ##l## to ##-l## without passing through the throat?PeterDonis said:Not necessarily. See my post #4.
By traveling through the rest of the universe from one exterior sheet to the other.Onyx said:But how would a traveller get from ##l## to ##-l## without passing through the throat?