[smallnamespace]

Note that under our current understanding of General Relativity, wormholes will rapidly collapse under their own gravity so quickly that not even a single photon would be able to traverse it because it closes off.

There's a theoretical way to stabilize it: put 'exotic matter' in the middle. Unlike all other matter, exotic matter has a negative energy density. This is the same sort of matter that would be needed to create an Alcubierre warp drive.

Unfortunately, we don't have any idea how to go about creating exotic matter. The closest we've come is the Casimir effect, when a region between two very close conductive plates will in some ways act as if there were negative energy.

[1] http://www.bibliotecapleyades.net/ciencia/negativeenergy/neg...

[sullyj3]

> Unfortunately, we don't have any idea how to go about creating exotic matter

A priori, I don't see any reason to believe that creating it should be possible. It's never been observed, and I'm assuming there aren't any models which predict any methods by which it might come into existence. That's as good as saying it's made up to me.

[yarg]

Just a quibble, you are referring here to a form of matter with a specific exotic property, which is not a property necessarily held by all forms of exotic matter.

[dwaltrip]

TLDR: theoretically possible with hypothetical extrapolations of existing physics, but incredibly unlikely that the needed extrapolations are both possible and viable for use by humans

[samstave]

This is such a fascinating comment - can you please give me an ELI5 out-of-the-loop comment to help me understand