[CaptainCrunch]

Interesting articles on wormholes


https://phys.org/news/2018-12-scient...wormholes.html

Wormholes are a recurring motif in science fiction. A wormhole is a sort of tunnel that joins distant points in space, or even two universes, via space-time curvature. Theoretically, such a tunnel could be traversed from one point in space to another without actually traveling the distance between them. Roman Konoplya, a RUDN physicist, evaluated the possibility of such interstellar travel.
"Our hope for the existence of these exotic objects rests on the fact that Einstein's equations allow for wormholes as their solution. However, for wormholes to be traversable and not to collapse because of gravitational effects, the repulsion force in the bottleneck of a wormhole should be extremely high," says Roman Konoplya.

"Some preliminary studies of foreign colleagues seemed to indicate the possibility of such stability. However, we confirmed that a wormhole according to Einstein's theory with quantum corrections is critically unstable. Evidently, an unstable system cannot exist in nature as any reaction with the environment would cause it to disintegrate. Mathematically, it is expressed in unlimited growth of initially neglected minor system deviation from statistical balance. Unfortunately, these results mean that we still don't have a theoretically consistent wormhole model without exotic assumptions," said Konoplya.