Astrophysicists at the Russian People’s Friendship University (RUDN) have presented theoretical evidence for the possible existence of traversable wormholes in the universe, described by the Friedman model. This model is based on general relativity, and although it was developed 100 years ago, it remains one of the most important models in cosmology. The study was published in the journal Universe. Wormholes are objects with strong space-time curvature, similar to tunnels, that can connect different regions of the same universe, and even different universes. The scientific leader of the study, Professor Kirill Bronnikov, PhD in Physical and Mathematical Sciences at RUDN University, pointed out that it turns out that even photons cannot pass through the wormholes that were originally thought. New research is shifting focus to traversable wormholes supported by dusty material.
The researchers worked on a generalized form of the famous Lemaître-Tollman-Bondy solution, which describes the evolution of the spherically symmetric distribution of electrically neutral dust within the framework of general relativity. They introduced an external source of electric or magnetic field and a nonzero cosmological constant into the model to find the mathematical conditions for the existence of a traversable wormhole. The results showed that the possibility of passing through a wormhole depends on the parameters and initial conditions of the wormhole “entry.” Scientists have expanded this model to include multiple universes, with a “mother” universe connected to a “child” universe via a wormhole. Opposite charges will inevitably arise in her one “pole” of the wormhole, which can lead to the appearance of a similar invasion into another universe. Some wormholes can connect different parts of the same universe.
Observable signatures of such objects, especially the cosmic microwave background and magnetic field properties, may be the subject of further study. It is particularly interesting to compare the properties of the wormhole model with the observed parameters of the cosmic cavity.