There has been much debate over whether space-time travel is possible through wormholes. Most studies have suggested that these hypothetical shortcuts are not possible because any vehicle passing one can immediately cause its collapse. However, a new theory says that space-time travel through wormholes may finally be possible. A wormhole is a tunnel-like connection through space and time. Its two mouths are connected by a “throat” and provide a path that a traveler can follow to a distant point.
Theoretically, wormholes can be made by joining the centers of black holes and white holes. It creates a tunnel through space-time. Joining them is necessary because black holes don’t let anything out, and white holes don’t let anything in.
according to a report good By Live Science, the easiest way to create a wormhole is to “expand” the idea of a black hole with its mirror image, a white hole. Since this idea was first proposed by Albert Einstein and Nathan Rosen, the wormhole has also been called the Einstein–Rosen bridge.
Einstein and Rosen created their wormhole with the Schwarzschild metric – one of many indicators of black holes and wormholes. Most of the later analyzes used the same metric. However, the researchers say there is a problem with this metric – it breaks down at a particular distance from the black hole, known today as the Schwarzschild radius, or event horizon.
So, physicist Pascal Coiron at the French ENS Lyon school tried the Eddington–Finkelstein metric, according to which particles pass directly through the event horizon and fall into a black hole, never to be seen again. Unlike the Schwarzschild metric, Koirn found that the Eddington–Finkelstein metric did not break at a particular distance from the black hole.
Does this mean that wormholes are stable? Not necessary. Because if physicists tried to create a black hole-white hole combination in the real world, their energy density would rip everything apart.
Live Science reports that Koiran’s paper is scheduled to be published in an upcoming issue of the Journal of Modern Physics D. The paper was described in October preprint database arXiv.